diff --git a/source/lib/allocators.cpp b/source/lib/allocators.cpp
index 2524feb324..074279c1a6 100644
--- a/source/lib/allocators.cpp
+++ b/source/lib/allocators.cpp
@@ -59,7 +59,7 @@ static inline size_t round_up_to_page(size_t size)
 static inline LibError LibError_from_mmap(void* ret, bool warn_if_failed = true)
 {
 	if(ret != MAP_FAILED)
-		return ERR_OK;
+		return INFO_OK;
 	return LibError_from_errno(warn_if_failed);
 }
 
@@ -177,7 +177,7 @@ static LibError validate_da(DynArray* da)
 	if(prot & ~(PROT_READ|PROT_WRITE|PROT_EXEC|DA_NOT_OUR_MEM))
 		WARN_RETURN(ERR_6);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 #define CHECK_DA(da) RETURN_ERR(validate_da(da))
@@ -206,7 +206,7 @@ LibError da_alloc(DynArray* da, size_t max_size)
 	da->prot        = PROT_READ|PROT_WRITE;
 	da->pos         = 0;
 	CHECK_DA(da);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -231,7 +231,7 @@ LibError da_wrap_fixed(DynArray* da, u8* p, size_t size)
 	da->prot        = PROT_READ|PROT_WRITE|DA_NOT_OUR_MEM;
 	da->pos         = 0;
 	CHECK_DA(da);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -260,7 +260,7 @@ LibError da_free(DynArray* da)
 	// da_free is supposed to be called even in the above case.
 	if(!was_wrapped)
 		RETURN_ERR(mem_release(p, size));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -303,7 +303,7 @@ LibError da_set_size(DynArray* da, size_t new_size)
 
 	da->cur_size = new_size;
 	CHECK_DA(da);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -323,7 +323,7 @@ LibError da_reserve(DynArray* da, size_t size)
 
 	if(da->pos + size > da->cur_size)
 		return da_set_size(da, da->cur_size + expand_amount);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -349,7 +349,7 @@ LibError da_set_prot(DynArray* da, int prot)
 	RETURN_ERR(mem_protect(da->base, da->cur_size, prot));
 
 	CHECK_DA(da);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -370,7 +370,7 @@ LibError da_read(DynArray* da, void* data, size_t size)
 
 	memcpy2(data, da->base+da->pos, size);
 	da->pos += size;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -388,7 +388,7 @@ LibError da_append(DynArray* da, const void* data, size_t size)
 	RETURN_ERR(da_reserve(da, size));
 	memcpy2(da->base+da->pos, data, size);
 	da->pos += size;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -449,7 +449,7 @@ LibError pool_create(Pool* p, size_t max_size, size_t el_size)
 		p->el_size = round_up(el_size, ALIGN);
 	p->freelist = 0;
 	RETURN_ERR(da_alloc(&p->da, max_size));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -622,7 +622,7 @@ LibError bucket_create(Bucket* b, size_t el_size)
 	*(u8**)b->bucket = 0;	// terminate list
 	b->pos = round_up(sizeof(u8*), ALIGN);
 	b->num_buckets = 1;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/debug.cpp b/source/lib/debug.cpp
index d82c55816f..9ce78c7dc2 100644
--- a/source/lib/debug.cpp
+++ b/source/lib/debug.cpp
@@ -235,7 +235,7 @@ LibError debug_write_crashlog(const wchar_t* text)
 	fwprintf(f, L"Last known activity:\n\n %ls\n", debug_log);
 
 	fclose(f);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/debug.h b/source/lib/debug.h
index 2e32969a84..14cd938b51 100644
--- a/source/lib/debug.h
+++ b/source/lib/debug.h
@@ -415,7 +415,7 @@ const size_t DBG_FILE_LEN = 100;
  *
  * note: all of the output parameters are optional; we pass back as much
  * information as is available and desired.
- * @return LibError; ERR_OK iff any information was successfully
+ * @return LibError; INFO_OK iff any information was successfully
  * retrieved and stored.
  **/
 extern LibError debug_resolve_symbol(void* ptr_of_interest, char* sym_name, char* file, int* line);
diff --git a/source/lib/debug_stl.cpp b/source/lib/debug_stl.cpp
index cf90e2cdf3..27d5727957 100644
--- a/source/lib/debug_stl.cpp
+++ b/source/lib/debug_stl.cpp
@@ -702,7 +702,7 @@ LibError stl_get_container_info(const char* type_name, const u8* p, size_t size,
 		return ERR_STL_CNT_UNKNOWN;	// NOWARN
 	if(!valid)
 		return ERR_STL_CNT_INVALID;	// NOWARN
-	return ERR_OK;
+	return INFO_OK;
 }
 
 #endif
diff --git a/source/lib/input.cpp b/source/lib/input.cpp
index 8ac69f4c55..b8ae532db1 100644
--- a/source/lib/input.cpp
+++ b/source/lib/input.cpp
@@ -111,7 +111,7 @@ LibError in_record(const char* fn)
 
 	state = RECORD;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -135,7 +135,7 @@ LibError in_playback(const char* fn)
 
 	state = PLAYBACK;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/lib_errors.cpp b/source/lib/lib_errors.cpp
index 677b7a1a24..fe46577809 100644
--- a/source/lib/lib_errors.cpp
+++ b/source/lib/lib_errors.cpp
@@ -106,7 +106,7 @@ LibError LibError_from_posix(int ret, bool warn_if_failed)
 {
 	debug_assert(ret == 0 || ret == -1);
 	if(ret == 0)
-		return ERR_OK;
+		return INFO_OK;
 	return LibError_from_errno(warn_if_failed);
 }
 
diff --git a/source/lib/lib_errors.h b/source/lib/lib_errors.h
index b9f533f559..826f92aaa8 100644
--- a/source/lib/lib_errors.h
+++ b/source/lib/lib_errors.h
@@ -77,7 +77,7 @@ macros to simplify this task: function calls can be wrapped in an
 
 Consider the following example:
   LibError ret = doWork();
-  if(ret != ERR_OK) { warnUser(ret); return ret; }
+  if(ret != INFO_OK) { warnUser(ret); return ret; }
 This can be replaced by:
   CHECK_ERR(doWork());
 
@@ -182,7 +182,7 @@ extern void error_description_r(LibError err, char* buf, size_t max_chars);
 // conversion to/from other error code definitions.
 // notes:
 // - these functions will raise a warning (before returning any error code
-//   except ERR_OK) unless warn_if_failed is explicitly set to false.
+//   except INFO_OK) unless warn_if_failed is explicitly set to false.
 // - other conversion routines (e.g. to/from Win32) are implemented in
 //   the corresponding modules to keep this header portable.
 
@@ -344,10 +344,10 @@ STMT(\
 // error code is usually negative; positive denotes warnings.
 //   if negative, absolute value must be within [ERR_MIN, ERR_MAX).
 
-// ERR_OK doesn't really need a string, but must be part of enum LibError
+// INFO_OK doesn't really need a string, but must be part of enum LibError
 // due to compiler checks. (and calling error_description_r(0) should
 // never happen, but we set the text accordingly..)
-ERR(0, ERR_OK, "(but return value was 0 which indicates success)")
+ERR(0, INFO_OK, "(but return value was 0 which indicates success)")
 ERR(-1, ERR_FAIL, "Function failed (no details available)")
 
 // note: these values are > 100 to allow multiplexing them with
diff --git a/source/lib/lockfree.cpp b/source/lib/lockfree.cpp
index cfc0997295..a88929c587 100644
--- a/source/lib/lockfree.cpp
+++ b/source/lib/lockfree.cpp
@@ -448,7 +448,7 @@ LibError lfl_init(LFList* list)
 
 	list->head = 0;
 	atomic_add(&active_data_structures, 1);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -640,7 +640,7 @@ retry:
 	// call list_lookup to ensure # non-released nodes < # threads.
 	else
 		list_lookup(list, key, pos);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -698,7 +698,7 @@ LibError lfh_init(LFHash* hash, size_t num_entries)
 		}
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/ogl.cpp b/source/lib/ogl.cpp
index 4830946a50..282f9cc3dc 100644
--- a/source/lib/ogl.cpp
+++ b/source/lib/ogl.cpp
@@ -355,7 +355,7 @@ LibError ogl_get_gfx_info()
 	// add "OpenGL" to differentiate this from the real driver version
 	// (returned by platform-specific detect routines).
 	snprintf(gfx_drv_ver, ARRAY_SIZE(gfx_drv_ver), "OpenGL %s", version);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/path_util.cpp b/source/lib/path_util.cpp
index ca2c6448fe..253dd7d636 100644
--- a/source/lib/path_util.cpp
+++ b/source/lib/path_util.cpp
@@ -69,7 +69,7 @@ bool path_is_subpath(const char* s1, const char* s2)
 }
 
 
-// if path is invalid, return a descriptive error code, otherwise ERR_OK.
+// if path is invalid, return a descriptive error code, otherwise INFO_OK.
 LibError path_validate(const char* path)
 {
 	// disallow "/", because it would create a second 'root' (with name = "").
@@ -105,11 +105,11 @@ LibError path_validate(const char* path)
 			break;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
-// if name is invalid, return a descriptive error code, otherwise ERR_OK.
+// if name is invalid, return a descriptive error code, otherwise INFO_OK.
 // (name is a path component, i.e. that between directory separators)
 LibError path_component_validate(const char* name)
 {
@@ -131,7 +131,7 @@ LibError path_component_validate(const char* name)
 			break;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -185,7 +185,7 @@ LibError path_append(char* dst, const char* path1, const char* path2, uint flags
 	if(need_terminator)
 		strcpy(dst+len2, "/");	// safe
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -208,7 +208,7 @@ LibError path_replace(char* dst, const char* src, const char* remove, const char
 
 	// prepend replace.
 	RETURN_ERR(path_append(dst, replace, start));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -222,22 +222,14 @@ LibError path_replace(char* dst, const char* src, const char* remove, const char
 // characters up to the last dir separator, if any).
 const char* path_name_only(const char* path)
 {
-	// first try: look for portable '/'
-	const char* slash = strrchr(path, '/');
-	// not present
-	if(!slash)
-	{
-		// now look for platform-specific DIR_SEP
-		slash = strrchr(path, DIR_SEP);
-		// neither present, it's a filename only
-		if(!slash)
-			return path;
-	}
+	const char* portable_slash = strrchr(path, '/');
+	const char* platform_slash = strrchr(path, DIR_SEP);
+	// neither present, it's a filename only
+	if(!portable_slash && !platform_slash)
+		return path;
 
-// TODO: take max of portableslash, nonportableslash
-
-	const char* name = slash+1;
-	return name;
+	// return name, i.e. component after the last portable or platform slash
+	return MAX(portable_slash, platform_slash)+1;
 }
 
 
@@ -347,7 +339,7 @@ LibError path_foreach_component(const char* path_org, PathComponentCb cb, void*
 		cur_component = slash+1;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -389,7 +381,7 @@ LibError path_package_set_dir(PathPackage* pp, const char* dir)
 
 	pp->end = pp->path+len;
 	pp->chars_left = ARRAY_SIZE(pp->path)-len;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -398,5 +390,5 @@ LibError path_package_set_dir(PathPackage* pp, const char* dir)
 LibError path_package_append_file(PathPackage* pp, const char* path)
 {
 	CHECK_ERR(strcpy_s(pp->end, pp->chars_left, path));
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/path_util.h b/source/lib/path_util.h
index 8f1cb696aa..8f42d54b28 100644
--- a/source/lib/path_util.h
+++ b/source/lib/path_util.h
@@ -36,12 +36,12 @@
 #include "posix.h"	// PATH_MAX
 
 // if path is invalid (see source for criteria), return a
-// descriptive error code, otherwise ERR_OK.
+// descriptive error code, otherwise INFO_OK.
 extern LibError path_validate(const char* path);
 #define CHECK_PATH(path) RETURN_ERR(path_validate(path))
 
 // if name is invalid, (see source for criteria), return a
-// descriptive error code, otherwise ERR_OK.
+// descriptive error code, otherwise INFO_OK.
 extern LibError path_component_validate(const char* name);
 
 
@@ -49,10 +49,10 @@ extern LibError path_component_validate(const char* name);
 // (equal counts as subpath)
 extern bool path_is_subpath(const char* s1, const char* s2);
 
-// if path is invalid, return a descriptive error code, otherwise ERR_OK.
+// if path is invalid, return a descriptive error code, otherwise INFO_OK.
 extern LibError path_validate(const char* path);
 
-// if name is invalid, return a descriptive error code, otherwise ERR_OK.
+// if name is invalid, return a descriptive error code, otherwise INFO_OK.
 // (name is a path component, i.e. that between directory separators)
 extern LibError path_component_validate(const char* name);
 
@@ -112,7 +112,7 @@ extern const char* path_extension(const char* fn);
 // ctx: context parameter that was passed to path_foreach_component.
 // return: INFO_CB_CONTINUE to continue operation normally; anything else
 // will cause path_foreach_component to abort immediately and return that.
-// no need to 'abort' (e.g. return ERR_OK) after a filename is encountered -
+// no need to 'abort' (e.g. return INFO_OK) after a filename is encountered -
 // that's taken care of automatically.
 //
 // rationale:
diff --git a/source/lib/res/file/archive.cpp b/source/lib/res/file/archive.cpp
index 052024bb7c..dabf32f10a 100644
--- a/source/lib/res/file/archive.cpp
+++ b/source/lib/res/file/archive.cpp
@@ -121,7 +121,7 @@ static LibError Archive_reload(Archive* a, const char* fn, Handle)
 	RETURN_ERR(zip_populate_archive(&a->f, a));
 	a->is_loaded = 1;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Archive_validate(const Archive* a)
@@ -131,13 +131,13 @@ static LibError Archive_validate(const Archive* a)
 	if(debug_is_pointer_bogus(a->ents))
 		WARN_RETURN(ERR_1);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Archive_to_string(const Archive* a, char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "(%u files)", a->num_files);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -169,7 +169,7 @@ static LibError archive_get_file_info(Archive* a, const char* fn, uintptr_t meme
 	if(memento)
 	{
 		ent = (ArchiveEntry*)memento;
-		return ERR_OK;
+		return INFO_OK;
 	}
 	else
 	{
@@ -178,7 +178,7 @@ static LibError archive_get_file_info(Archive* a, const char* fn, uintptr_t meme
 			if(a->ents[i].atom_fn == atom_fn)
 			{
 				ent = &a->ents[i];
-				return ERR_OK;
+				return INFO_OK;
 			}
 	}
 
@@ -211,7 +211,7 @@ LibError archive_enum(const Handle ha, const FileCB cb, const uintptr_t user)
 			return ret;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -223,7 +223,7 @@ LibError archive_allocate_entries(Archive* a, size_t num_entries)
 	a->ents = (ArchiveEntry*)mem_alloc(num_entries * sizeof(ArchiveEntry), 32);
 	if(!a->ents)
 		WARN_RETURN(ERR_NO_MEM);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -235,7 +235,7 @@ LibError archive_allocate_entries(Archive* a, size_t num_entries)
 LibError archive_add_file(Archive* a, const ArchiveEntry* ent)
 {
 	a->ents[a->num_files++] = *ent;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -290,7 +290,7 @@ LibError afile_stat(Handle ha, const char* fn, struct stat* s)
 
 	s->st_size  = ent->ucsize;
 	s->st_mtime = ent->mtime;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -308,7 +308,7 @@ LibError afile_validate(const File* f)
 		WARN_RETURN(ERR_1);
 	// note: af->ctx is 0 if file is not compressed.
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 #define CHECK_AFILE(f) RETURN_ERR(afile_validate(f))
@@ -359,7 +359,7 @@ LibError afile_open(const Handle ha, const char* fn, uintptr_t memento, uint fla
 	af->ctx       = ctx;
 	af->is_mapped = 0;
 	CHECK_AFILE(f);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -371,7 +371,7 @@ LibError afile_close(File* f)
 	// other File fields don't need to be freed/cleared
 	comp_free(af->ctx);
 	af->ctx = 0;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -446,7 +446,7 @@ LibError afile_io_issue(File* f, off_t user_ofs, size_t max_output_size, void* u
 	RETURN_ERR(file_io_issue(&a->f, cofs, csize, cbuf, aio->io));
 
 	af->last_cofs += (off_t)csize;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -489,7 +489,7 @@ LibError afile_io_wait(FileIo* io, void*& buf, size_t& size)
 		size = raw_size;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -510,7 +510,7 @@ LibError afile_io_validate(const FileIo* io)
 		WARN_RETURN(ERR_1);
 	// <ctx> and <max_output_size> have no invariants we could check.
 	RETURN_ERR(file_io_validate(aio->io));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -548,7 +548,7 @@ public:
 		if(user_cb)
 			ret = user_cb(user_cb_ctx, ucblock, ucsize, bytes_processed);
 		if(ucsize_left == 0)
-			ret = ERR_OK;
+			ret = INFO_OK;
 		return ret;
 	}
 
@@ -681,7 +681,7 @@ LibError afile_map(File* f, void*& p, size_t& size)
 	size = f->size;
 
 	af->is_mapped = 1;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/file/archive_builder.cpp b/source/lib/res/file/archive_builder.cpp
index 4f75fec4f9..cc55b87b5e 100644
--- a/source/lib/res/file/archive_builder.cpp
+++ b/source/lib/res/file/archive_builder.cpp
@@ -179,7 +179,7 @@ static LibError read_and_compress_file(const char* atom_fn, uintptr_t ctx,
 	// note: no need to free cdata - it is owned by the
 	// compression context and can be reused.
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -195,7 +195,7 @@ LibError archive_build_init(const char* P_archive_filename, Filenames V_fns,
 	for(ab->num_files = 0; ab->V_fns[ab->num_files]; ab->num_files++) {}
 
 	ab->i = 0;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -210,7 +210,7 @@ int archive_build_continue(ArchiveBuildState* ab)
 			break;
 
 		ArchiveEntry ent; void* file_contents; FileIOBuf buf;
-		if(read_and_compress_file(V_fn, ab->ctx, ent, file_contents, buf) == ERR_OK)
+		if(read_and_compress_file(V_fn, ab->ctx, ent, file_contents, buf) == INFO_OK)
 		{
 			(void)zip_archive_add_file(ab->za, &ent, file_contents);
 			(void)file_buf_free(buf);
@@ -226,7 +226,7 @@ int archive_build_continue(ArchiveBuildState* ab)
 	comp_free(ab->ctx); ab->ctx = 0;
 	(void)zip_archive_finish(ab->za);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -251,7 +251,7 @@ LibError archive_build(const char* P_archive_filename, Filenames V_fns)
 	{
 		int ret = archive_build_continue(&ab);
 		RETURN_ERR(ret);
-		if(ret == ERR_OK)
-			return ERR_OK;
+		if(ret == INFO_OK)
+			return INFO_OK;
 	}
 }
diff --git a/source/lib/res/file/compression.cpp b/source/lib/res/file/compression.cpp
index f92e8e77b4..22803a9b86 100644
--- a/source/lib/res/file/compression.cpp
+++ b/source/lib/res/file/compression.cpp
@@ -66,7 +66,7 @@ static LibError LibError_from_zlib(int zlib_err, bool warn_if_failed = true)
 	switch(zlib_err)
 	{
 	case Z_OK:
-		return ERR_OK;
+		return INFO_OK;
 	case Z_STREAM_END:
 		err =  ERR_EOF; break;
 	case Z_MEM_ERROR:
@@ -112,7 +112,7 @@ public:
 	{
 		next_out = 0;
 		avail_out = 0;
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	virtual LibError alloc_output(size_t in_size) = 0;
@@ -266,7 +266,7 @@ have_out_mem:
 		next_out  = out_mem;
 		avail_out = out_mem_size;
 
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 };	// class Compressor
@@ -339,7 +339,7 @@ public:
 		{
 			size_t required_size = (size_t)deflateBound(&zs, (uLong)in_size);
 			RETURN_ERR(alloc_output_impl(required_size));
-			return ERR_OK;
+			return INFO_OK;
 		}
 		else
 			WARN_RETURN(ERR_LOGIC);
@@ -396,7 +396,7 @@ public:
 
 		*out = zs.next_out - zs.total_out;
 		*out_size = zs.total_out;
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 
diff --git a/source/lib/res/file/file.cpp b/source/lib/res/file/file.cpp
index 395dd7d84f..f4e1866889 100644
--- a/source/lib/res/file/file.cpp
+++ b/source/lib/res/file/file.cpp
@@ -80,7 +80,7 @@ static SingleAllocator<PathPackage> pp_allocator;
 
 
 // prepare to iterate (once) over entries in the given directory.
-// if ERR_OK is returned, <d> is ready for subsequent dir_next_ent calls and
+// if INFO_OK is returned, <d> is ready for subsequent dir_next_ent calls and
 // must be freed via dir_close.
 LibError dir_open(const char* P_path, DirIterator* di)
 {
@@ -110,12 +110,12 @@ LibError dir_open(const char* P_path, DirIterator* di)
 		return LibError_from_errno();
 
 	(void)path_package_set_dir(pdi->pp, n_path);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
 // return ERR_DIR_END if all entries have already been returned once,
-// another negative error code, or ERR_OK on success, in which case <ent>
+// another negative error code, or INFO_OK on success, in which case <ent>
 // describes the next (order is unspecified) directory entry.
 LibError dir_next_ent(DirIterator* di, DirEnt* ent)
 {
@@ -167,7 +167,7 @@ get_another_entry:
 	ent->size  = s.st_size;
 	ent->mtime = s.st_mtime;
 	ent->name  = name;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -181,7 +181,7 @@ LibError dir_close(DirIterator* di)
 	errno = 0;
 	if(closedir(pdi->os_dir) < 0)
 		return LibError_from_errno();
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -225,7 +225,7 @@ bool file_exists(const char* fn)
 {
 	struct stat s;
 	const bool warn_if_failed = false;
-	return file_stat_impl(fn, &s, warn_if_failed) == ERR_OK;
+	return file_stat_impl(fn, &s, warn_if_failed) == INFO_OK;
 }
 
 
@@ -300,7 +300,7 @@ LibError file_validate(const File* f)
 	// note: don't check atom_fn - that complains at the end of
 	// file_open if flags & FILE_DONT_SET_FN and has no benefit, really.
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -370,7 +370,7 @@ LibError file_open(const char* P_fn, uint flags, File* f)
 	pf->fd       = fd;
 	CHECK_FILE(f);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -403,7 +403,7 @@ LibError file_close(File* f)
 	if(f->flags & FILE_WRITE)
 		file_cache_invalidate(f->atom_fn);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -466,7 +466,7 @@ LibError file_map(File* f, void*& p, size_t& size)
 have_mapping:
 	p = pf->mapping;
 	size = f->size;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -487,7 +487,7 @@ LibError file_unmap(File* f)
 
 	// still more than one reference remaining - done.
 	if(--pf->map_refs > 0)
-		return ERR_OK;
+		return INFO_OK;
 
 	// no more references: remove the mapping
 	void* p = pf->mapping;
@@ -509,7 +509,7 @@ LibError file_init()
 	// convenience
 	file_sector_size = sys_max_sector_size();
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 LibError file_shutdown()
@@ -517,5 +517,5 @@ LibError file_shutdown()
 	stats_dump();
 	path_shutdown();
 	file_io_shutdown();
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/res/file/file.h b/source/lib/res/file/file.h
index 2720278887..d7ed044ab1 100644
--- a/source/lib/res/file/file.h
+++ b/source/lib/res/file/file.h
@@ -137,12 +137,12 @@ struct DirEnt
 #define DIRENT_IS_DIR(p_ent) ((p_ent)->size == -1)
 
 // prepare to iterate (once) over entries in the given directory.
-// if ERR_OK is returned, <d> is ready for subsequent dir_next_ent calls and
+// if INFO_OK is returned, <d> is ready for subsequent dir_next_ent calls and
 // must be freed via dir_close.
 extern LibError dir_open(const char* P_path, DirIterator* d);
 
 // return ERR_DIR_END if all entries have already been returned once,
-// another negative error code, or ERR_OK on success, in which case <ent>
+// another negative error code, or INFO_OK on success, in which case <ent>
 // describes the next (order is unspecified) directory entry.
 extern LibError dir_next_ent(DirIterator* d, DirEnt* ent);
 
diff --git a/source/lib/res/file/file_cache.cpp b/source/lib/res/file/file_cache.cpp
index 462c75e98b..94a5ee6058 100644
--- a/source/lib/res/file/file_cache.cpp
+++ b/source/lib/res/file/file_cache.cpp
@@ -1070,7 +1070,7 @@ LibError file_buf_free(FileIOBuf buf, uint fb_flags)
 	const bool from_heap           = (fb_flags & FB_FROM_HEAP) != 0;
 
 	if(!buf)
-		return ERR_OK;
+		return INFO_OK;
 
 	size_t size; const char* atom_fn;
 	bool actually_removed = extant_bufs.find_and_remove(buf, size, atom_fn);
@@ -1107,7 +1107,7 @@ free_immediately:
 		stats_buf_free();
 	trace_notify_free(atom_fn, size);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1137,7 +1137,7 @@ LibError file_buf_set_real_fn(FileIOBuf buf, const char* atom_fn)
 	// note: removing and reinserting would be easiest, but would
 	// mess up the epoch field.
 	extant_bufs.replace_owner(buf, atom_fn);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1182,7 +1182,7 @@ LibError file_cache_add(FileIOBuf buf, size_t size, const char* atom_fn,
 
 	file_cache.add(atom_fn, buf, size, cost);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1247,7 +1247,7 @@ LibError file_cache_invalidate(const char* P_fn)
 		free_padded_buf(cached_buf, size);
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/file/file_internal.h b/source/lib/res/file/file_internal.h
index 57c12cb2f0..535d64b0fd 100644
--- a/source/lib/res/file/file_internal.h
+++ b/source/lib/res/file/file_internal.h
@@ -57,7 +57,7 @@ const size_t FILE_BLOCK_SIZE = 32*KiB;
 
 // helper routine used by functions that call back to a FileIOCB.
 //
-// bytes_processed is 0 if return value != { ERR_OK, INFO_CB_CONTINUE }
+// bytes_processed is 0 if return value != { INFO_OK, INFO_CB_CONTINUE }
 // note: don't abort if = 0: zip callback may not actually
 // output anything if passed very little data.
 extern LibError file_io_call_back(const void* block, size_t size,
diff --git a/source/lib/res/file/file_io.cpp b/source/lib/res/file/file_io.cpp
index 91dc0d04ed..7af41b2036 100644
--- a/source/lib/res/file/file_io.cpp
+++ b/source/lib/res/file/file_io.cpp
@@ -150,7 +150,7 @@ LibError file_io_issue(File* f, off_t ofs, size_t size, void* p, FileIo* io)
 	const BlockId disk_pos = block_cache_make_id(f->atom_fn, ofs);
 	stats_io_check_seek(disk_pos);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -197,7 +197,7 @@ LibError file_io_wait(FileIo* io, void*& p, size_t& size)
 
 	p = (void*)cb->aio_buf;	// cast from volatile void*
 	size = bytes_transferred;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -207,7 +207,7 @@ LibError file_io_discard(FileIo* io)
 	memset(pio->cb, 0, sizeof(aiocb));	// prevent further use.
 	aiocb_allocator.free_(pio->cb);
 	pio->cb = 0;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -224,7 +224,7 @@ LibError file_io_validate(const FileIo* io)
 	if(cb->aio_lio_opcode != LIO_WRITE && cb->aio_lio_opcode != LIO_READ && cb->aio_lio_opcode != LIO_NOP)
 		WARN_RETURN(ERR_3);
 	// all other aiocb fields have no invariants we could check.
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -253,7 +253,7 @@ size_t file_sector_size;
 
 // helper routine used by functions that call back to a FileIOCB.
 //
-// bytes_processed is 0 if return value != { ERR_OK, INFO_CB_CONTINUE }
+// bytes_processed is 0 if return value != { INFO_OK, INFO_CB_CONTINUE }
 // note: don't abort if = 0: zip callback may not actually
 // output anything if passed very little data.
 LibError file_io_call_back(const void* block, size_t size,
@@ -266,7 +266,7 @@ LibError file_io_call_back(const void* block, size_t size,
 		stats_cb_finish();
 
 		// failed - reset byte count in case callback didn't
-		if(ret != ERR_OK && ret != INFO_CB_CONTINUE)
+		if(ret != INFO_OK && ret != INFO_CB_CONTINUE)
 			bytes_processed = 0;
 
 		CHECK_ERR(ret);	// user might not have raised a warning; make sure
@@ -297,7 +297,7 @@ LibError file_io_get_buf(FileIOBuf* pbuf, size_t size,
 
 	// reading into temp buffers - ok.
 	if(!is_write && temp && cb != 0)
-		return ERR_OK;
+		return INFO_OK;
 
 	// reading and want buffer allocated.
 	if(!is_write && alloc)
@@ -305,12 +305,12 @@ LibError file_io_get_buf(FileIOBuf* pbuf, size_t size,
 		*pbuf = file_buf_alloc(size, atom_fn, fb_flags);
 		if(!*pbuf)	// very unlikely (size totally bogus or cache hosed)
 			WARN_RETURN(ERR_NO_MEM);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// writing from user-specified buffer - ok
 	if(is_write && user)
-		return ERR_OK;
+		return INFO_OK;
 
 	WARN_RETURN(ERR_INVALID_PARAM);
 }
@@ -446,7 +446,7 @@ class IOManager
 
 		RETURN_ERR(file_io_get_buf(pbuf, size, f->atom_fn, f->flags, cb));
 
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	void issue(IOSlot& slot)
@@ -474,7 +474,7 @@ class IOManager
 			LibError ret = file_io_issue(f, ofs, issue_size, buf, &slot.io);
 			// transfer failed - loop will now terminate after
 			// waiting for all pending transfers to complete.
-			if(ret != ERR_OK)
+			if(ret != INFO_OK)
 				err = ret;
 		}
 
@@ -533,7 +533,7 @@ class IOManager
 		{
 			size_t bytes_processed;
 			err = file_io_call_back(block, block_size, cb, ctx, bytes_processed);
-			if(err == INFO_CB_CONTINUE || err == ERR_OK)
+			if(err == INFO_CB_CONTINUE || err == INFO_OK)
 				total_processed += bytes_processed;
 			// else: processing failed.
 			// loop will now terminate after waiting for all
@@ -626,7 +626,7 @@ public:
 				file_buf_add_padding(org_buf, size, ofs_misalign);
 		}
 
-		if(err != INFO_CB_CONTINUE && err != ERR_OK)
+		if(err != INFO_CB_CONTINUE && err != INFO_OK)
 			return (ssize_t)err;
 		return bytes_transferred;
 	}
diff --git a/source/lib/res/file/file_util.cpp b/source/lib/res/file/file_util.cpp
index 8b53280fc5..42821b09ff 100644
--- a/source/lib/res/file/file_util.cpp
+++ b/source/lib/res/file/file_util.cpp
@@ -33,7 +33,7 @@ LibError file_get_sorted_dirents(const char* P_path, DirEnts& dirents)
 	std::sort(dirents.begin(), dirents.end(), dirent_less);
 
 	(void)dir_close(&d);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -55,8 +55,8 @@ LibError file_get_sorted_dirents(const char* P_path, DirEnts& dirents)
 //   of converting from/to native path (we just give 'em the dirent name).
 LibError file_enum(const char* P_path, const FileCB cb, const uintptr_t user)
 {
-	LibError stat_err = ERR_OK;	// first error encountered by stat()
-	LibError cb_err   = ERR_OK;	// first error returned by cb
+	LibError stat_err = INFO_OK;	// first error encountered by stat()
+	LibError cb_err   = INFO_OK;	// first error returned by cb
 
 	DirEnts dirents;
 	RETURN_ERR(file_get_sorted_dirents(P_path, dirents));
@@ -82,7 +82,7 @@ LibError file_enum(const char* P_path, const FileCB cb, const uintptr_t user)
 		}
 	}
 
-	if(cb_err != ERR_OK)
+	if(cb_err != INFO_OK)
 		return cb_err;
 	return stat_err;
 }
@@ -154,7 +154,7 @@ LibError dir_filtered_next_ent(DirIterator* di, DirEnt* ent, const char* filter)
 		}
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -234,7 +234,7 @@ LibError vfs_dir_enum(const char* start_path, uint flags, const char* user_filte
 	}
 	while(!dir_queue.empty());
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -271,7 +271,7 @@ void next_numbered_filename(const char* fn_fmt,
 			Handle hd = vfs_dir_open(dir);
 			if(hd > 0)
 			{
-				while(vfs_dir_next_ent(hd, &ent, 0) == ERR_OK)
+				while(vfs_dir_next_ent(hd, &ent, 0) == INFO_OK)
 				{
 					if(!DIRENT_IS_DIR(&ent) && sscanf(ent.name, name_fmt, &num) == 1)
 						max_num = MAX(num, max_num);
@@ -282,9 +282,9 @@ void next_numbered_filename(const char* fn_fmt,
 		else
 		{
 			DirIterator it;
-			if(dir_open(dir, &it) == ERR_OK)
+			if(dir_open(dir, &it) == INFO_OK)
 			{
-				while(dir_next_ent(&it, &ent) == ERR_OK)
+				while(dir_next_ent(&it, &ent) == INFO_OK)
 					if(!DIRENT_IS_DIR(&ent) && sscanf(ent.name, name_fmt, &num) == 1)
 						max_num = MAX(num, max_num);
 				(void)dir_close(&it);
diff --git a/source/lib/res/file/path.cpp b/source/lib/res/file/path.cpp
index 955c4c2627..ec0bfd8e6e 100644
--- a/source/lib/res/file/path.cpp
+++ b/source/lib/res/file/path.cpp
@@ -80,7 +80,7 @@ static LibError convert_path(char* dst, const char* src, Conversion conv = TO_NA
 
 		// end of string - done
 		if(c == '\0')
-			return ERR_OK;
+			return INFO_OK;
 	}
 }
 
@@ -185,7 +185,7 @@ LibError file_set_root_dir(const char* argv0, const char* rel_path)
 	//    (note: already 0-terminated, since it's static)
 	n_root_dir_len = strlen(n_root_dir)+1;	// +1 for trailing DIR_SEP
 	n_root_dir[n_root_dir_len-1] = DIR_SEP;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/file/trace.cpp b/source/lib/res/file/trace.cpp
index d10d1329c4..48ba806a1a 100644
--- a/source/lib/res/file/trace.cpp
+++ b/source/lib/res/file/trace.cpp
@@ -252,7 +252,7 @@ LibError trace_write_to_file(const char* trace_filename)
 		write_entry(f, ent);
 
 	(void)fclose(f);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -308,7 +308,7 @@ LibError trace_read_from_file(const char* trace_filename, Trace* t)
 	if(t->total_ents == 0)
 		WARN_RETURN(ERR_TRACE_EMPTY);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -332,7 +332,7 @@ void trace_gen_random(size_t num_entries)
 				struct stat s;
 				LibError ret = vfs_stat(atom_fn, &s);
 				// ought to apply due to vfs_exists above.
-				debug_assert(ret == ERR_OK && S_ISREG(s.st_mode));
+				debug_assert(ret == INFO_OK && S_ISREG(s.st_mode));
 
 				size = s.st_size;
 				break;
@@ -460,6 +460,6 @@ LibError trace_run(const char* trace_filename, uint flags)
 
 	trace_clear();
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
diff --git a/source/lib/res/file/vfs.cpp b/source/lib/res/file/vfs.cpp
index 519ef2c392..c0145a9b34 100644
--- a/source/lib/res/file/vfs.cpp
+++ b/source/lib/res/file/vfs.cpp
@@ -119,7 +119,7 @@ static LibError VDir_reload(VDir* vd, const char* V_dir_path, Handle UNUSED(hvd)
 
 	RETURN_ERR(xdir_open(V_dir_path, &vd->di));
 	vd->di_valid = 1;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError VDir_validate(const VDir* vd)
@@ -127,7 +127,7 @@ static LibError VDir_validate(const VDir* vd)
 	// note: <di> is mostly opaque and cannot be validated.
 	if(vd->di.filter && !isprint(vd->di.filter[0]))
 		WARN_RETURN(ERR_1);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError VDir_to_string(const VDir* vd, char* buf)
@@ -138,7 +138,7 @@ static LibError VDir_to_string(const VDir* vd, char* buf)
 	if(!filter)
 		filter = "*";
 	snprintf(buf, H_STRING_LEN, "(\"%s\")", filter);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -275,7 +275,7 @@ static LibError VFile_reload(VFile* vf, const char* V_path, Handle)
 	// we're done if file is already open. need to check this because
 	// reload order (e.g. if resource opens a file) is unspecified.
 	if(xfile_is_open(&vf->f))
-		return ERR_OK;
+		return INFO_OK;
 
 	TFile* tf;
 	uint lf = (flags & FILE_WRITE)? LF_CREATE_MISSING : 0;
@@ -300,20 +300,20 @@ static LibError VFile_reload(VFile* vf, const char* V_path, Handle)
 	vf->is_valid = 1;
 	vf->tf = tf;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError VFile_validate(const VFile* vf)
 {
 	// <ofs> doesn't have any invariant we can check.
 	RETURN_ERR(xfile_validate(&vf->f));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError VFile_to_string(const VFile* UNUSED(vf), char* buf)
 {
 	strcpy(buf, "");	// safe
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -419,7 +419,7 @@ LibError vfs_load(const char* V_fn, FileIOBuf& buf, size_t& size,
 		// accept more data - this is all it gets and we need to
 		// translate return value to avoid confusing callers.
 		if(ret == INFO_CB_CONTINUE)
-			ret = ERR_OK;
+			ret = INFO_OK;
 		size = actual_size;
 		return ret;
 	}
@@ -448,7 +448,7 @@ LibError vfs_load(const char* V_fn, FileIOBuf& buf, size_t& size,
 	stats_cache(CR_MISS, size, atom_fn);
 
 	(void)vfs_close(hf);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -529,7 +529,7 @@ static LibError VIo_validate(const VIo* vio)
 static LibError VIo_to_string(const VIo* vio, char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "buf=%p size=%d", vio->buf, vio->size);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -621,7 +621,7 @@ static LibError reload_without_rebuild(const char* fn)
 
 	RETURN_ERR(h_reload(fn));
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -726,7 +726,7 @@ LibError vfs_reload_changed_files()
 	for(uint i = 0; i < num_pending; i++)
 		RETURN_ERR(reload_without_rebuild(pending_reloads[i]));
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/file/vfs_mount.cpp b/source/lib/res/file/vfs_mount.cpp
index 5fd2462d0a..5442b1b795 100644
--- a/source/lib/res/file/vfs_mount.cpp
+++ b/source/lib/res/file/vfs_mount.cpp
@@ -184,7 +184,7 @@ LibError mount_realpath(const char* V_path, const Mount* m, char* P_real_path)
 	if(P_len != 0 && P_real_path[P_len-1] == '/')
 		P_real_path[P_len-1] = '\0';
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -278,7 +278,7 @@ static bool archive_less(Handle hza1, Handle hza2)
 typedef std::vector<Handle> Archives;
 typedef Archives::const_iterator ArchiveCIt;
 
-// return value is ERR_OK iff archives != 0 and the file should not be
+// return value is INFO_OK iff archives != 0 and the file should not be
 // added to VFS (e.g. because it is an archive).
 static LibError enqueue_archive(const char* name, const char* P_archive_dir, Archives* archives)
 {
@@ -308,23 +308,23 @@ static LibError enqueue_archive(const char* name, const char* P_archive_dir, Arc
 	archives->push_back(archive);
 
 	// avoid also adding the archive file itself to VFS.
-	// (when caller sees ERR_OK, they skip the file)
+	// (when caller sees INFO_OK, they skip the file)
 do_not_add_to_VFS_or_list:
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError mount_archive(TDir* td, const Mount& m)
 {
 	ZipCBParams params(td, &m);
 	archive_enum(m.archive, afile_cb, (uintptr_t)&params);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError mount_archives(TDir* td, Archives* archives, const Mount* mount)
 {
 	// VFS_MOUNT_ARCHIVES flag wasn't set, or no archives present
 	if(archives->empty())
-		return ERR_OK;
+		return INFO_OK;
 
 	std::sort(archives->begin(), archives->end(), archive_less);
 
@@ -339,7 +339,7 @@ static LibError mount_archives(TDir* td, Archives* archives, const Mount* mount)
 		mount_archive(td, m);
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -365,7 +365,7 @@ static LibError enqueue_dir(TDir* parent_td, const char* name,
 {
 	// caller doesn't want us to enqueue subdirectories; bail.
 	if(!dir_queue)
-		return ERR_OK;
+		return INFO_OK;
 
 	// skip versioning system directories - this avoids cluttering the
 	// VFS with hundreds of irrelevant files.
@@ -373,7 +373,7 @@ static LibError enqueue_dir(TDir* parent_td, const char* name,
 	// strstr the entire path) and it is assumed the Zip file builder
 	// will take care of it.
 	if(!strcmp(name, "CVS") || !strcmp(name, ".svn"))
-		return ERR_OK;
+		return INFO_OK;
 
 	// prepend parent path to get complete pathname.
 	char P_path[PATH_MAX];
@@ -384,7 +384,7 @@ static LibError enqueue_dir(TDir* parent_td, const char* name,
 	CHECK_ERR(tree_add_dir(parent_td, name, &td));
 	// .. and add it to the list of directories to visit.
 	dir_queue->push_back(TDirAndPath(td, P_path));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -418,10 +418,10 @@ static LibError add_ent(TDir* td, DirEnt* ent, const char* P_parent_path, const
 	// else: it's a file (dir_next_ent discards everything except for
 	// file and subdirectory entries).
 
-	if(enqueue_archive(name, m->P_name.c_str(), archives) == ERR_OK)
+	if(enqueue_archive(name, m->P_name.c_str(), archives) == INFO_OK)
 		// return value indicates this file shouldn't be added to VFS
 		// (see enqueue_archive)
-		return ERR_OK;
+		return INFO_OK;
 
 	// notify archive builder that this file could be archived but
 	// currently isn't; if there are too many of these, archive will be
@@ -460,7 +460,7 @@ static LibError populate_dir(TDir* td, const char* P_path, const Mount* m,
 	{
 		// don't RETURN_ERR since we need to close d.
 		err = dir_next_ent(&d, &ent);
-		if(err != ERR_OK)
+		if(err != INFO_OK)
 			break;
 
 		err = add_ent(td, &ent, P_path, m, dir_queue, archives);
@@ -468,7 +468,7 @@ static LibError populate_dir(TDir* td, const char* P_path, const Mount* m,
 	}
 
 	WARN_ERR(dir_close(&d));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -486,7 +486,7 @@ static LibError populate_dir(TDir* td, const char* P_path, const Mount* m,
 // every single file to see if it's an archive (slow!).
 static LibError mount_dir_tree(TDir* td, const Mount& m)
 {
-	LibError err = ERR_OK;
+	LibError err = INFO_OK;
 
 	// add_ent fills these queues with dirs/archives if the corresponding
 	// flags are set.
@@ -509,7 +509,7 @@ static LibError mount_dir_tree(TDir* td, const Mount& m)
 		const char* P_path = dir_queue.front().path.c_str();
 
 		LibError ret = populate_dir(td, P_path, &m, pdir_queue, parchives, m.flags);
-		if(err == ERR_OK)
+		if(err == INFO_OK)
 			err = ret;
 
 		// prevent searching for archives in subdirectories (slow!). this
@@ -524,7 +524,7 @@ static LibError mount_dir_tree(TDir* td, const Mount& m)
 	// do not pass parchives because that has been set to 0!
 	mount_archives(td, &archives, &m);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -666,7 +666,7 @@ LibError mount_rebuild()
 {
 	tree_clear();
 	remount_all();
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -730,8 +730,8 @@ LibError mount_make_vfs_path(const char* P_path, char* V_path)
 		const char* remove = m.P_name.c_str();
 		const char* replace = m.V_mount_point.c_str();
 
-		if(path_replace(V_path, P_path, remove, replace) == ERR_OK)
-			return ERR_OK;
+		if(path_replace(V_path, P_path, remove, replace) == INFO_OK)
+			return INFO_OK;
 	}
 
 	WARN_RETURN(ERR_TNODE_NOT_FOUND);
@@ -791,7 +791,7 @@ LibError vfs_set_write_target(const char* P_target_dir)
 		if(!strcmp(m.P_name.c_str(), P_target_dir))
 		{
 			write_target = &m;
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 
@@ -814,7 +814,7 @@ LibError set_mount_to_write_target(TFile* tf)
 	// opened for writing, which will change these values anyway.
 	tree_update_file(tf, 0, 0);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -858,12 +858,12 @@ LibError mount_attach_real_dir(RealDir* rd, const char* P_path, const Mount* m,
 		// note: do not cause this function to return an error if
 		// something goes wrong - this step is basically optional.
 		char N_path[PATH_MAX];
-		if(file_make_full_native_path(P_path, N_path) == ERR_OK)
+		if(file_make_full_native_path(P_path, N_path) == INFO_OK)
 			(void)dir_add_watch(N_path, &rd->watch);
 	}
 #endif
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -884,7 +884,7 @@ LibError mount_create_real_dir(const char* V_path, const Mount* m)
 	debug_assert(VFS_PATH_IS_DIR(V_path));
 
 	if(!m || m == MULTIPLE_MOUNTINGS || m->type != MT_FILE)
-		return ERR_OK;
+		return INFO_OK;
 
 	char P_path[PATH_MAX];
 	RETURN_ERR(mount_realpath(V_path, m, P_path));
@@ -897,5 +897,5 @@ LibError mount_populate(TDir* td, RealDir* rd)
 {
 	UNUSED2(td);
 	UNUSED2(rd);
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/res/file/vfs_optimizer.cpp b/source/lib/res/file/vfs_optimizer.cpp
index 4ca5e65e1e..cf022665ae 100644
--- a/source/lib/res/file/vfs_optimizer.cpp
+++ b/source/lib/res/file/vfs_optimizer.cpp
@@ -294,7 +294,7 @@ class ConnectionBuilder
 					// note: this happens when trace contains by now
 					// deleted or unarchivable files.
 					TFile* tf;
-					if(tree_lookup(te->atom_fn, &tf) == ERR_OK)
+					if(tree_lookup(te->atom_fn, &tf) == INFO_OK)
 						if(is_archivable(tf))
 							add_connection(connections, te->atom_fn);
 				}
@@ -320,7 +320,7 @@ public:
 
 		add_connections_from_runs(t, connections);
 
-		return ERR_OK;
+		return INFO_OK;
 	}
 };
 
@@ -602,14 +602,14 @@ static LibError vfs_opt_init(const char* trace_filename, const char* archive_fn_
 	Filenames V_fns = &fn_vector[0];
 
 	RETURN_ERR(archive_build_init(archive_fn, V_fns, &ab));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
 static int vfs_opt_continue()
 {
 	int ret = archive_build_continue(&ab);
-	if(ret == ERR_OK)
+	if(ret == INFO_OK)
 	{
 		// do NOT delete source files! some apps might want to
 		// keep them (e.g. for source control), or name them differently.
@@ -674,7 +674,7 @@ static LibError build_mini_archive(const char* mini_archive_fn_fmt)
 	next_numbered_filename(mini_archive_fn_fmt, &nfi, mini_archive_fn, use_vfs);
 
 	RETURN_ERR(archive_build(mini_archive_fn, V_fns));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -709,7 +709,7 @@ int vfs_opt_auto_build(const char* trace_filename,
 			RETURN_ERR(build_mini_archive(mini_archive_fn_fmt));
 
 			state = NOP;
-			return ERR_OK;	// "finished"
+			return INFO_OK;	// "finished"
 		}
 	}
 
@@ -717,7 +717,7 @@ int vfs_opt_auto_build(const char* trace_filename,
 	{
 		int ret = vfs_opt_continue();
 		// just finished
-		if(ret == ERR_OK)
+		if(ret == INFO_OK)
 			state = NOP;
 		return ret;
 	}
@@ -731,7 +731,7 @@ LibError vfs_opt_rebuild_main_archive(const char* trace_filename, const char* ar
 	{
 		int ret = vfs_opt_auto_build(trace_filename, archive_fn_fmt, 0, true);
 		RETURN_ERR(ret);
-		if(ret == ERR_OK)
-			return ERR_OK;
+		if(ret == INFO_OK)
+			return INFO_OK;
 	}
 }
diff --git a/source/lib/res/file/vfs_redirector.cpp b/source/lib/res/file/vfs_redirector.cpp
index 4aa4f7054f..8650b53d14 100644
--- a/source/lib/res/file/vfs_redirector.cpp
+++ b/source/lib/res/file/vfs_redirector.cpp
@@ -51,7 +51,7 @@ LibError file_open_vfs(const char* V_path, uint flags, TFile* tf,
 	RETURN_ERR(file_open(N_path, flags|FILE_DONT_SET_FN, f));
 	// file_open didn't set fc.atom_fn due to FILE_DONT_SET_FN.
 	f->atom_fn = file_make_unique_fn_copy(V_path);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static const FileProvider_VTbl archive_vtbl =
@@ -99,7 +99,7 @@ static LibError vtbl_validate(const FileProvider_VTbl* vtbl)
 		WARN_RETURN(ERR_INVALID_PARAM);
 	if(vtbl->magic != vtbl_magic)
 		WARN_RETURN(ERR_CORRUPTED);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 #define CHECK_VTBL(type) RETURN_ERR(vtbl_validate(type))
@@ -163,7 +163,7 @@ const FileProvider_VTbl* vtbl = (c == 'F')? &file_vtbl : &archive_vtbl;
 	// note: don't assign these unless we succeed to avoid the
 	// false impression that all is well.
 	f->type = vtbl;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 LibError xfile_close(File* f)
@@ -173,7 +173,7 @@ LibError xfile_close(File* f)
 	// the dtor after reload fails.
 	// note: this takes care of checking the vtbl.
 	if(!xfile_is_open(f))
-		return ERR_OK;
+		return INFO_OK;
 	LibError ret = f->type->file_close(f);
 	f->type = 0;
 	return ret;
diff --git a/source/lib/res/file/vfs_tree.cpp b/source/lib/res/file/vfs_tree.cpp
index 8a6413fb4e..002c290c28 100644
--- a/source/lib/res/file/vfs_tree.cpp
+++ b/source/lib/res/file/vfs_tree.cpp
@@ -265,7 +265,7 @@ RealDir rd;	// HACK; removeme
 		children.insert(name, node);
 
 		*pnode = node;
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	LibError find_and_add(const char* name, TNodeType type, TNode** pnode, const Mount* m = 0)
@@ -447,7 +447,7 @@ static LibError lookup(TDir* td, const char* path, uint flags, TNode** pnode)
 
 	// success.
 	*pnode = p.node;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -567,7 +567,7 @@ LibError tree_add_file(TDir* td, const char* name,
 	stats_vfs_file_add(size);
 
 	set_most_recent_if_newer(mtime);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -576,7 +576,7 @@ LibError tree_add_dir(TDir* td, const char* name, TDir** ptd)
 	TNode* node;
 	RETURN_ERR(td->find_and_add(name, NT_DIR, &node));
 	*ptd = (TDir*)node;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -592,7 +592,7 @@ LibError tree_lookup_dir(const char* V_path, TDir** ptd, uint flags)
 	CHECK_ERR(lookup(td, V_path, flags, &node));
 		// directories should exist, so warn if this fails
 	*ptd = (TDir*)node;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -606,7 +606,7 @@ LibError tree_lookup(const char* V_path, TFile** pfile, uint flags)
 	LibError ret = lookup(tree_root, V_path, flags, &node);
 	RETURN_ERR(ret);
 	*pfile = (TFile*)node;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -647,7 +647,7 @@ LibError tree_add_path(const char* V_dir_path, const Mount* m, TDir** ptd)
 	AddPathCbParams p(m);
 	RETURN_ERR(path_foreach_component(V_dir_path, add_path_cb, &p));
 	*ptd = p.td;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -691,7 +691,7 @@ LibError tree_dir_open(const char* V_dir_path, DirIterator* di)
 	tdi->it  = td->begin();
 	tdi->end = td->end();
 	tdi->td  = td;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -725,7 +725,7 @@ LibError tree_dir_next_ent(DirIterator* di, DirEnt* ent)
 		debug_warn("invalid TNode type");
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -735,7 +735,7 @@ LibError tree_dir_close(DirIterator* UNUSED(d))
 
 	// no further cleanup needed. we could zero out d but that might
 	// hide bugs; the iterator is safe (will not go beyond end) anyway.
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -780,7 +780,7 @@ LibError tree_stat(const TFile* tf, struct stat* s)
 	s->st_size  = tf->size;
 	s->st_mtime = tf->mtime;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/file/vfs_tree.h b/source/lib/res/file/vfs_tree.h
index 7efa142629..c7a0f16879 100644
--- a/source/lib/res/file/vfs_tree.h
+++ b/source/lib/res/file/vfs_tree.h
@@ -73,7 +73,7 @@ enum TreeLookupFlags
 //   a higher-priority file of the same name already exists
 //   (used by VFile_reload when opening for writing).
 //
-// output params are only valid if ERR_OK is returned.
+// output params are only valid if INFO_OK is returned.
 extern LibError tree_lookup(const char* path, TFile** ptf, uint flags = 0);
 
 // starting at VFS root, traverse <path> and pass back information
@@ -87,7 +87,7 @@ extern LibError tree_lookup(const char* path, TFile** ptf, uint flags = 0);
 // <path> can be to a file or dir (in which case it must end in '/',
 // to make sure the last component is treated as a directory).
 //
-// output params are only valid if ERR_OK is returned.
+// output params are only valid if INFO_OK is returned.
 extern LibError tree_lookup_dir(const char* V_path, TDir** ptd, uint flags = 0);
 
 
diff --git a/source/lib/res/file/zip.cpp b/source/lib/res/file/zip.cpp
index 612f67be0c..5b01bc7a32 100644
--- a/source/lib/res/file/zip.cpp
+++ b/source/lib/res/file/zip.cpp
@@ -365,7 +365,7 @@ static const u8* za_find_id(const u8* buf, size_t size, const void* start, u32 m
 
 // search for ECDR in the last <max_scan_amount> bytes of the file.
 // if found, fill <dst_ecdr> with a copy of the (little-endian) ECDR and
-// return ERR_OK, otherwise IO error or ERR_CORRUPTED.
+// return INFO_OK, otherwise IO error or ERR_CORRUPTED.
 static LibError za_find_ecdr(File* f, size_t max_scan_amount, ECDR* dst_ecdr_le)
 {
 	// don't scan more than the entire file
@@ -386,7 +386,7 @@ static LibError za_find_ecdr(File* f, size_t max_scan_amount, ECDR* dst_ecdr_le)
 	if(ecdr_le)
 	{
 		*dst_ecdr_le = *ecdr_le;
-		ret = ERR_OK;
+		ret = INFO_OK;
 	}
 
 	file_buf_free(buf);
@@ -413,17 +413,17 @@ completely_bogus:
 	// expected case: ECDR at EOF; no file comment (=> we only need to
 	// read 512 bytes)
 	LibError ret = za_find_ecdr(f, ECDR_SIZE, &ecdr_le);
-	if(ret == ERR_OK)
+	if(ret == INFO_OK)
 	{
 have_ecdr:
 		ecdr_decompose(&ecdr_le, cd_entries, cd_ofs, cd_size);
-		return ERR_OK;
+		return INFO_OK;
 	}
 	// last resort: scan last 66000 bytes of file
 	// (the Zip archive comment field - up to 64k - may follow ECDR).
 	// if the zip file is < 66000 bytes, scan the whole file.
 	ret = za_find_ecdr(f, 66000u, &ecdr_le);
-	if(ret == ERR_OK)
+	if(ret == INFO_OK)
 		goto have_ecdr;
 
 	// both ECDR scans failed - this is not a valid Zip file.
@@ -451,7 +451,7 @@ have_ecdr:
 
 // analyse an opened Zip file; call back into archive.cpp to
 // populate the Archive object with a list of the files it contains.
-// returns ERR_OK on success, ERR_CORRUPTED if file is recognizable as
+// returns INFO_OK on success, ERR_CORRUPTED if file is recognizable as
 // a Zip file but invalid, otherwise ERR_UNKNOWN_FORMAT or IO error.
 //
 // fairly slow - must read Central Directory from disk
@@ -471,7 +471,7 @@ LibError zip_populate_archive(File* f, Archive* a)
 	RETURN_ERR(file_io(f, cd_ofs, cd_size, &buf));
 
 	// iterate through Central Directory
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 	const CDFH* cdfh = (const CDFH*)buf;
 	size_t ofs_to_next_cdfh = 0;
 	for(uint i = 0; i < cd_entries; i++)
@@ -494,7 +494,7 @@ LibError zip_populate_archive(File* f, Archive* a)
 		if(ae.csize && ae.ucsize)
 		{
 			ret = archive_add_file(a, &ae);
-			if(ret != ERR_OK)
+			if(ret != INFO_OK)
 				break;
 		}
 	}
@@ -605,7 +605,7 @@ LibError zip_archive_create(const char* zip_filename, ZipArchive** pza)
 		WARN_RETURN(ERR_NO_MEM);
 	*za = za_copy;
 	*pza = za;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -645,7 +645,7 @@ LibError zip_archive_add_file(ZipArchive* za, const ArchiveEntry* ae, void* file
 
 	za->cd_entries++;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -669,5 +669,5 @@ LibError zip_archive_finish(ZipArchive* za)
 	(void)file_close(&za->f);
 	(void)pool_destroy(&za->cdfhs);
 	za_mgr.release(za);
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/res/file/zip.h b/source/lib/res/file/zip.h
index 8b28d6af74..9b64bb5535 100644
--- a/source/lib/res/file/zip.h
+++ b/source/lib/res/file/zip.h
@@ -30,7 +30,7 @@ struct ArchiveEntry;
 
 // analyse an opened Zip file; call back into archive.cpp to
 // populate the Archive object with a list of the files it contains.
-// returns ERR_OK on success, ERR_CORRUPTED if file is recognizable as
+// returns INFO_OK on success, ERR_CORRUPTED if file is recognizable as
 // a Zip file but invalid, otherwise ERR_UNKNOWN_FORMAT or IO error.
 //
 // fairly slow - must read Central Directory from disk
@@ -70,8 +70,4 @@ extern LibError zip_archive_add_file(ZipArchive* za, const ArchiveEntry* ae, voi
 // IO cost: writes out Central Directory to disk (about 70 bytes per file).
 extern LibError zip_archive_finish(ZipArchive* za);
 
-
-template<typename T> u32 u32_from_larger2(T x);
-template<typename T> u16 u16_from_larger2(T x);
-
 #endif	// #ifndef ZIP_H__
diff --git a/source/lib/res/graphics/cursor.cpp b/source/lib/res/graphics/cursor.cpp
index 6d85c09065..bfe402db1c 100644
--- a/source/lib/res/graphics/cursor.cpp
+++ b/source/lib/res/graphics/cursor.cpp
@@ -121,7 +121,7 @@ public:
 
 		(void)ogl_tex_set_filter(ht, GL_NEAREST);
 		(void)ogl_tex_upload(ht);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	void destroy()
@@ -158,7 +158,7 @@ public:
 			WARN_RETURN(ERR_1);
 		if(ht < 0)
 			WARN_RETURN(ERR_2);
-		return ERR_OK;
+		return INFO_OK;
 	}
 };
 
@@ -214,13 +214,13 @@ static LibError Cursor_reload(Cursor* c, const char* name, Handle)
 	{
 		LibError err=c->gl_cursor.create(filename, hotspotx, hotspoty);
 		
-		if (err == ERR_OK)
+		if (err == INFO_OK)
 			c->gl_sys_cursor = load_empty_sys_cursor();
 		
 		return err;			
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Cursor_validate(const Cursor* c)
@@ -230,14 +230,14 @@ static LibError Cursor_validate(const Cursor* c)
 
 	if(!c->sys_cursor)
 		RETURN_ERR(c->gl_cursor.validate());
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Cursor_to_string(const Cursor* c, char* buf)
 {
 	const char* type = c->sys_cursor? "sys" : "gl";
 	snprintf(buf, H_STRING_LEN, "(%s)", type);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -268,7 +268,7 @@ LibError cursor_draw(const char* name, int x, int y)
 	if(!name)
 	{
 		WARN_ERR(sys_cursor_set(0));
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	Handle hc = cursor_load(name);
@@ -287,5 +287,5 @@ LibError cursor_draw(const char* name, int x, int y)
 	}
 
 	(void)cursor_free(hc);
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/res/graphics/ogl_shader.cpp b/source/lib/res/graphics/ogl_shader.cpp
index b09cb83f48..ebf55ff0d9 100644
--- a/source/lib/res/graphics/ogl_shader.cpp
+++ b/source/lib/res/graphics/ogl_shader.cpp
@@ -87,7 +87,7 @@ static LibError Ogl_Shader_reload(Ogl_Shader* shdr, const char* filename, Handle
 	LibError err = ERR_FAIL;
 
 	if (shdr->id)
-		return ERR_OK;
+		return INFO_OK;
 
 	FileIOBuf file;
 	size_t file_size;
@@ -148,7 +148,7 @@ static LibError Ogl_Shader_reload(Ogl_Shader* shdr, const char* filename, Handle
 	}
 
 	(void)file_buf_free(file);
-	return ERR_OK;
+	return INFO_OK;
 
 fail_shadercreated:
 	pglDeleteObjectARB(shdr->id);
@@ -173,13 +173,13 @@ static void Ogl_Shader_dtor(Ogl_Shader* shdr)
 static LibError Ogl_Shader_validate(const Ogl_Shader* UNUSED(shdr))
 {
 	// TODO
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Ogl_Shader_to_string(const Ogl_Shader* UNUSED(shdr), char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "");
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -212,7 +212,7 @@ LibError ogl_shader_attach(GLhandleARB program, Handle& h)
 
 	pglAttachObjectARB(program, shdr->id);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -283,7 +283,7 @@ static LibError do_load_shader(
 	// TODO: How will this work with automatic reload?
 	ogl_shader_free(hshader);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -291,7 +291,7 @@ static LibError do_load_shader(
 static LibError Ogl_Program_reload(Ogl_Program* p, const char* filename, Handle h)
 {
 	if (p->id)
-		return ERR_OK;
+		return INFO_OK;
 
 	oglCheck();
 	
@@ -377,7 +377,7 @@ static LibError Ogl_Program_reload(Ogl_Program* p, const char* filename, Handle
 		WARN_RETURN(ERR_SHDR_LINK);
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -394,13 +394,13 @@ static void Ogl_Program_dtor(Ogl_Program* p)
 static LibError Ogl_Program_validate(const Ogl_Program* UNUSED(p))
 {
 	// TODO
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Ogl_Program_to_string(const Ogl_Program* UNUSED(p), char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "");
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -428,7 +428,7 @@ LibError ogl_program_use(Handle h)
 	if (!h)
 	{
 		pglUseProgramObjectARB(0);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	Ogl_Program* p = H_USER_DATA(h, Ogl_Program);
@@ -439,7 +439,7 @@ LibError ogl_program_use(Handle h)
 	}
 
 	pglUseProgramObjectARB(p->id);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/graphics/ogl_tex.cpp b/source/lib/res/graphics/ogl_tex.cpp
index 28a057f21a..d43ca87943 100644
--- a/source/lib/res/graphics/ogl_tex.cpp
+++ b/source/lib/res/graphics/ogl_tex.cpp
@@ -409,7 +409,7 @@ static LibError OglTex_reload(OglTex* ot, const char* fn, Handle h)
 {
 	// we're reusing a freed but still in-memory OglTex object
 	if(ot->flags & OT_IS_UPLOADED)
-		return ERR_OK;
+		return INFO_OK;
 
 	// if we don't already have the texture in memory (*), load from file.
 	// * this happens if the texture is "wrapped".
@@ -424,7 +424,7 @@ static LibError OglTex_reload(OglTex* ot, const char* fn, Handle h)
 	if(ot->flags & OT_NEED_AUTO_UPLOAD)
 		(void)ogl_tex_upload(h);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError OglTex_validate(const OglTex* ot)
@@ -466,13 +466,13 @@ static LibError OglTex_validate(const OglTex* ot)
 	// .. note: don't check ot->fmt and ot->int_fmt - they aren't set
 	//    until during ogl_tex_upload.
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError OglTex_to_string(const OglTex* ot, char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "id=%d", ot->id);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -585,7 +585,7 @@ LibError ogl_tex_set_filter(Handle ht, GLint filter)
 		warn_if_uploaded(ht, ot);
 		ot->state.filter = filter;
 	}
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -605,7 +605,7 @@ LibError ogl_tex_set_wrap(Handle ht, GLint wrap)
 		warn_if_uploaded(ht, ot);
 		ot->state.wrap = wrap;
 	}
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -690,7 +690,7 @@ static LibError get_mipmaps(Tex* t, GLint filter, uint q_flags, int* plevels_to_
 
 	*plevels_to_skip = TEX_BASE_LEVEL_ONLY;
 	if(!need_mipmaps)
-		return ERR_OK;
+		return INFO_OK;
 
 	// image already contains pregenerated mipmaps; we need do nothing.
 	// this is the nicest case, because they are fastest to load
@@ -735,7 +735,7 @@ static LibError get_mipmaps(Tex* t, GLint filter, uint q_flags, int* plevels_to_
 		*plevels_to_skip = log2(reduce);
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -806,7 +806,7 @@ LibError ogl_tex_upload(const Handle ht, GLenum fmt_ovr, uint q_flags_ovr, GLint
 	// upload already happened; no work to do.
 	// (this also happens if a cached texture is "loaded")
 	if(ot->flags & OT_IS_UPLOADED)
-		return ERR_OK;
+		return INFO_OK;
 
 	debug_assert(ot->flags & OT_TEX_VALID);
 
@@ -851,7 +851,7 @@ LibError ogl_tex_upload(const Handle ht, GLenum fmt_ovr, uint q_flags_ovr, GLint
 		ot->flags &= ~OT_TEX_VALID;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -871,7 +871,7 @@ LibError ogl_tex_get_size(Handle ht, uint* w, uint* h, uint* bpp)
 		*h = ot->t.h;
 	if(bpp)
 		*bpp = ot->t.bpp;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -890,7 +890,7 @@ LibError ogl_tex_get_format(Handle ht, uint* flags, GLenum* fmt)
 			debug_warn("hasn't been defined yet!");
 		*fmt = ot->fmt;
 	}
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -906,7 +906,7 @@ LibError ogl_tex_get_data(Handle ht, void** p)
 	H_DEREF(ht, OglTex, ot);
 
 	*p = tex_get_data(&ot->t);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -935,7 +935,7 @@ LibError ogl_tex_bind(Handle ht, uint unit)
 	if(ht == 0)
 	{
 		glDisable(GL_TEXTURE_2D);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// if this fails, the texture unit's state remains unchanged.
@@ -951,7 +951,7 @@ LibError ogl_tex_bind(Handle ht, uint unit)
 
 	glEnable(GL_TEXTURE_2D);
 	glBindTexture(GL_TEXTURE_2D, ot->id);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/graphics/tex.cpp b/source/lib/res/graphics/tex.cpp
index 2dc9b5ac89..c14383015f 100644
--- a/source/lib/res/graphics/tex.cpp
+++ b/source/lib/res/graphics/tex.cpp
@@ -70,7 +70,7 @@ LibError tex_validate(const Tex* t)
 	if(orientation == (TEX_BOTTOM_UP|TEX_TOP_DOWN))
 		WARN_RETURN(ERR_4);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 #define CHECK_TEX(t) RETURN_ERR(tex_validate(t))
@@ -94,14 +94,14 @@ LibError tex_validate_plain_format(uint bpp, uint flags)
 	if(grey)
 	{
 		if(bpp == 8 && !alpha)
-			return ERR_OK;
+			return INFO_OK;
 		WARN_RETURN(ERR_TEX_FMT_INVALID);
 	}
 
 	if(bpp == 24 && !alpha)
-		return ERR_OK;
+		return INFO_OK;
 	if(bpp == 32 && alpha)
-		return ERR_OK;
+		return INFO_OK;
 
 	WARN_RETURN(ERR_TEX_FMT_INVALID);
 }
@@ -254,7 +254,7 @@ static LibError add_mipmaps(Tex* t, uint w, uint h, uint bpp,
 	t->hm = hm;
 	t->ofs = 0;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -292,7 +292,7 @@ TIMER_ACCRUE(tc_plain_transform);
 	RETURN_ERR(tex_validate_plain_format(bpp, flags));
 	// .. nothing to do
 	if(!transforms)
-		return ERR_OK;
+		return INFO_OK;
 
 	// allocate copy of the image data.
 	// rationale: L1 cache is typically A2 => swapping in-place with a
@@ -372,7 +372,7 @@ TIMER_ACCRUE(tc_plain_transform);
 		RETURN_ERR(add_mipmaps(t, w, h, bpp, new_data, data_size));
 
 	CHECK_TEX(t);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -392,7 +392,7 @@ LibError tex_transform(Tex* t, uint transforms)
 		remaining_transforms = target_flags ^ t->flags;
 		// we're finished (all required transforms have been done)
 		if(remaining_transforms == 0)
-			return ERR_OK;
+			return INFO_OK;
 
 		LibError ret = tex_codec_transform(t, remaining_transforms);
 		if(ret != 0)
@@ -401,7 +401,7 @@ LibError tex_transform(Tex* t, uint transforms)
 
 	// last chance
 	RETURN_ERR(plain_transform(t, remaining_transforms));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -487,7 +487,7 @@ bool tex_is_known_extension(const char* filename)
 {
 	const TexCodecVTbl* dummy;
 	// found codec for it => known extension
-	if(tex_codec_for_filename(filename, &dummy) == ERR_OK)
+	if(tex_codec_for_filename(filename, &dummy) == INFO_OK)
 		return true;
 
 	return false;
@@ -527,7 +527,7 @@ LibError tex_wrap(uint w, uint h, uint bpp, uint flags, void* img, Tex* t)
 	t->ofs = (u8*)img - (u8*)reported_ptr;
 
 	CHECK_TEX(t);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -651,7 +651,7 @@ LibError tex_decode(const u8* data, size_t data_size, MEM_DTOR dtor, Tex* t)
 
 	flip_to_global_orientation(t);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -679,7 +679,7 @@ LibError tex_encode(Tex* t, const char* fn, DynArray* da)
 		WARN_RETURN(err);
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -709,7 +709,7 @@ LibError tex_load(const char* fn, Tex* t, uint file_flags)
 	// wasn't compressed) or was replaced by a new buffer for the image data.
 
 	CHECK_TEX(t);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -722,7 +722,7 @@ LibError tex_write(Tex* t, const char* fn)
 	RETURN_ERR(tex_encode(t, fn, &da));
 
 	// write to disk
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 	{
 	const size_t sector_aligned_size = round_up(da.cur_size, file_sector_size);
 	(void)da_set_size(&da, sector_aligned_size);
diff --git a/source/lib/res/graphics/tex_bmp.cpp b/source/lib/res/graphics/tex_bmp.cpp
index e643464520..e912f9adea 100644
--- a/source/lib/res/graphics/tex_bmp.cpp
+++ b/source/lib/res/graphics/tex_bmp.cpp
@@ -118,7 +118,7 @@ static LibError bmp_decode(DynArray* restrict da, Tex* restrict t)
 	t->h     = h;
 	t->bpp   = bpp;
 	t->flags = flags;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/graphics/tex_codec.cpp b/source/lib/res/graphics/tex_codec.cpp
index 0b027cd89f..150804c935 100644
--- a/source/lib/res/graphics/tex_codec.cpp
+++ b/source/lib/res/graphics/tex_codec.cpp
@@ -60,7 +60,7 @@ LibError tex_codec_for_filename(const char* fn, const TexCodecVTbl** c)
 	{
 		// we found it
 		if((*c)->is_ext(ext))
-			return ERR_OK;
+			return INFO_OK;
 	}
 
 	return ERR_UNKNOWN_FORMAT;	// NOWARN
@@ -78,7 +78,7 @@ LibError tex_codec_for_header(const u8* file, size_t file_size, const TexCodecVT
 	{
 		// we found it
 		if((*c)->is_hdr(file))
-			return ERR_OK;
+			return INFO_OK;
 	}
 
 	WARN_RETURN(ERR_UNKNOWN_FORMAT);
@@ -105,8 +105,8 @@ LibError tex_codec_transform(Tex* t, uint transforms)
 	{
 		LibError err = c->transform(t, transforms);
 		// success
-		if(err == ERR_OK)
-			return ERR_OK;
+		if(err == INFO_OK)
+			return INFO_OK;
 		// something went wrong
 		else if(err != INFO_TEX_CODEC_CANNOT_HANDLE)
 		{
@@ -164,7 +164,7 @@ LibError tex_codec_alloc_rows(const u8* data, size_t h, size_t pitch,
 	}
 
 	debug_assert(pos == end);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -175,5 +175,5 @@ LibError tex_codec_write(Tex* t, uint transforms, const void* hdr, size_t hdr_si
 	void* img_data = tex_get_data(t); const size_t img_size = tex_img_size(t);
 	RETURN_ERR(da_append(da, hdr, hdr_size));
 	RETURN_ERR(da_append(da, img_data, img_size));
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/res/graphics/tex_dds.cpp b/source/lib/res/graphics/tex_dds.cpp
index ebf34e0ed6..4187abc257 100644
--- a/source/lib/res/graphics/tex_dds.cpp
+++ b/source/lib/res/graphics/tex_dds.cpp
@@ -301,7 +301,7 @@ static LibError s3tc_decompress(Tex* t)
 	t->ofs = 0;
 	t->bpp = out_bpp;
 	t->flags &= ~TEX_DXT;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -492,7 +492,7 @@ static LibError decode_pf(const DDPIXELFORMAT* pf, uint* bpp_, uint* flags_)
 
 	*bpp_ = bpp;
 	*flags_ = flags;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -580,7 +580,7 @@ static LibError decode_sd(const DDSURFACEDESC2* sd, uint* w_, uint* h_,
 	*h_ = h;
 	*bpp_ = bpp;
 	*flags_ = flags;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -618,7 +618,7 @@ static LibError dds_decode(DynArray* restrict da, Tex* restrict t)
 	t->h     = h;
 	t->bpp   = bpp;
 	t->flags = flags;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -640,7 +640,7 @@ static LibError dds_transform(Tex* t, uint transforms)
 	if(dxt && transform_dxt)
 	{
 		RETURN_ERR(s3tc_decompress(t));
-		return ERR_OK;
+		return INFO_OK;
 	}
 	// both are DXT (unsupported; there are no flags we can change while
 	// compressed) or requesting compression (not implemented) or
diff --git a/source/lib/res/graphics/tex_jpg.cpp b/source/lib/res/graphics/tex_jpg.cpp
index f084cee711..8d6cb16f5f 100644
--- a/source/lib/res/graphics/tex_jpg.cpp
+++ b/source/lib/res/graphics/tex_jpg.cpp
@@ -499,7 +499,7 @@ static LibError jpg_decode_impl(DynArray* da,
 	// mem data source.
 	(void)jpeg_finish_decompress(cinfo);
 
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 	if(cinfo->err->num_warnings != 0)
 		ret = WARN_TEX_INVALID_DATA;
 
@@ -560,7 +560,7 @@ static LibError jpg_encode_impl(Tex* t,
 
 	jpeg_finish_compress(cinfo);
 
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 	if(cinfo->err->num_warnings != 0)
 		ret = WARN_TEX_INVALID_DATA;
 
diff --git a/source/lib/res/graphics/tex_png.cpp b/source/lib/res/graphics/tex_png.cpp
index 43e65ce78f..1404981134 100644
--- a/source/lib/res/graphics/tex_png.cpp
+++ b/source/lib/res/graphics/tex_png.cpp
@@ -146,7 +146,7 @@ static LibError png_decode_impl(DynArray* da,
 	t->bpp   = bpp;
 	t->flags = flags;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -189,7 +189,7 @@ static LibError png_encode_impl(Tex* t,
 	png_set_rows(png_ptr, info_ptr, (png_bytepp)rows);
 	png_write_png(png_ptr, info_ptr, png_transforms, 0);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/graphics/tex_tga.cpp b/source/lib/res/graphics/tex_tga.cpp
index 5ebb6662b6..831ca0d97a 100644
--- a/source/lib/res/graphics/tex_tga.cpp
+++ b/source/lib/res/graphics/tex_tga.cpp
@@ -138,7 +138,7 @@ static LibError tga_decode(DynArray* restrict da, Tex* restrict t)
 	t->h     = h;
 	t->bpp   = bpp;
 	t->flags = flags;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/graphics/unifont.cpp b/source/lib/res/graphics/unifont.cpp
index 99f0616a6c..0d5ff8dbb8 100644
--- a/source/lib/res/graphics/unifont.cpp
+++ b/source/lib/res/graphics/unifont.cpp
@@ -64,7 +64,7 @@ static LibError UniFont_reload(UniFont* f, const char* fn, Handle UNUSED(h))
 {
 	// already loaded
 	if(f->ht > 0)
-		return ERR_OK;
+		return INFO_OK;
 
 	f->glyphs_id = new glyphmap_id;
 	f->glyphs_size = new glyphmap_size;
@@ -163,7 +163,7 @@ static LibError UniFont_reload(UniFont* f, const char* fn, Handle UNUSED(h))
 	}
 
 	f->ht = ht;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError UniFont_validate(const UniFont* f)
@@ -178,13 +178,13 @@ static LibError UniFont_validate(const UniFont* f)
 		WARN_RETURN(ERR_3);
 	if(f->ListBase == 0 || f->ListBase > 1000000)	// suspicious
 		WARN_RETURN(ERR_4);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError UniFont_to_string(const UniFont* UNUSED(f), char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "");
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -208,7 +208,7 @@ LibError unifont_bind(const Handle h)
 	glListBase(f->ListBase);
 	BoundGlyphs = f->glyphs_id;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -308,11 +308,11 @@ LibError unifont_stringsize(const Handle h, const wchar_t* text, int& width, int
 		if (it == f->glyphs_size->end()) // Missing the missing glyph symbol - give up
 		{
 			debug_warn("Missing the missing glyph in a unifont!\n");
-			return ERR_OK;
+			return INFO_OK;
 		}
 
 		width += it->second; // Add the character's advance distance
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/res/h_mgr.cpp b/source/lib/res/h_mgr.cpp
index 02654a4038..795a9d7d92 100644
--- a/source/lib/res/h_mgr.cpp
+++ b/source/lib/res/h_mgr.cpp
@@ -313,7 +313,7 @@ have_idx:;
 	if(idx > last_in_use)
 		last_in_use = idx;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -321,7 +321,7 @@ static LibError free_idx(i32 idx)
 {
 	if(first_free == -1 || idx < first_free)
 		first_free = idx;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -488,7 +488,7 @@ static void warn_if_invalid(HDATA* hd)
 
 	// have the resource validate its user_data
 	LibError err = vtbl->validate(hd->user);
-	debug_assert(err == ERR_OK);
+	debug_assert(err == INFO_OK);
 
 	// make sure empty space in control block isn't touched
 	// .. but only if we're not storing a filename there
@@ -515,7 +515,7 @@ static LibError type_validate(H_Type type)
 	if(type->name == 0)
 		WARN_RETURN(ERR_INVALID_PARAM);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -567,7 +567,7 @@ static Handle reuse_existing_handle(uintptr_t key, H_Type type, uint flags)
 
 static LibError call_init_and_reload(Handle h, H_Type type, HDATA* hd, const char* fn, va_list* init_args)
 {
-	LibError err = ERR_OK;
+	LibError err = INFO_OK;
 	H_VTbl* vtbl = type;	// exact same thing but for clarity
 
 	// init
@@ -581,7 +581,7 @@ static LibError call_init_and_reload(Handle h, H_Type type, HDATA* hd, const cha
 		try
 		{
 			err = vtbl->reload(hd->user, fn, h);
-			if(err == ERR_OK)
+			if(err == INFO_OK)
 				warn_if_invalid(hd);
 		}
 		catch(std::bad_alloc)
@@ -694,7 +694,7 @@ static LibError h_free_idx(i32 idx, HDATA* hd)
 
 	// still references open or caching requests it stays - do not release.
 	if(hd->refs > 0 || hd->keep_open)
-		return ERR_OK;
+		return INFO_OK;
 
 	// actually release the resource (call dtor, free control block).
 
@@ -732,7 +732,7 @@ static LibError h_free_idx(i32 idx, HDATA* hd)
 
 	free_idx(idx);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -751,7 +751,7 @@ LibError h_free(Handle& h, H_Type type)
 		// 0-initialized or an error code; don't complain because this
 		// happens often and is harmless.
 		if(h_copy <= 0)
-			return ERR_OK;
+			return INFO_OK;
 		// this was a valid handle but was probably freed in the meantime.
 		// complain because this probably indicates a bug somewhere.
 		WARN_RETURN(ERR_INVALID_HANDLE);
@@ -818,7 +818,7 @@ LibError h_reload(const char* fn)
 		hd->type->dtor(hd->user);
 	}
 
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 
 	// now reload all affected handles
 	for(i32 i = 0; i <= last_in_use; i++)
diff --git a/source/lib/res/mem.cpp b/source/lib/res/mem.cpp
index 249d88c81a..cb1b2541cf 100644
--- a/source/lib/res/mem.cpp
+++ b/source/lib/res/mem.cpp
@@ -182,7 +182,7 @@ static void Mem_dtor(Mem* m)
 static LibError Mem_reload(Mem* m, const char* UNUSED(fn), Handle hm)
 {
 	set_alloc(m->raw_p, hm);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Mem_validate(const Mem* m)
@@ -195,7 +195,7 @@ static LibError Mem_validate(const Mem* m)
 		WARN_RETURN(ERR_3);
 	if(m->raw_size && m->raw_size < m->size)
 		WARN_RETURN(ERR_4);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError Mem_to_string(const Mem* m, char* buf)
@@ -210,7 +210,7 @@ static LibError Mem_to_string(const Mem* m, char* buf)
 	}
 
 	snprintf(buf, H_STRING_LEN, "p=%p size=%d owner=%s", m->p, m->size, owner_sym);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -253,7 +253,7 @@ LibError mem_free_h(Handle& hm)
 LibError mem_free_p(void*& p)
 {
 	if(!p)
-		return ERR_OK;
+		return INFO_OK;
 
 	Handle hm;
 	{
@@ -318,7 +318,7 @@ LibError mem_assign_user(Handle hm, void* user_p, size_t user_size)
 
 	m->p = user_p;
 	m->size = user_size;
-	return ERR_OK;
+	return INFO_OK;
 }
 */
 
@@ -420,7 +420,7 @@ LibError mem_get(Handle hm, u8** pp, size_t* psize)
 	if(psize)
 		*psize = m->size;
 	// leave hm locked
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/res/sound/snd_mgr.cpp b/source/lib/res/sound/snd_mgr.cpp
index cbd04af9d6..e96a0658e3 100644
--- a/source/lib/res/sound/snd_mgr.cpp
+++ b/source/lib/res/sound/snd_mgr.cpp
@@ -182,7 +182,7 @@ LibError snd_dev_set(const char* alc_new_dev_name)
 	{
 		// already using that device - done. (don't re-init)
 		if(alc_dev_name && !strcmp(alc_dev_name, alc_new_dev_name))
-			return ERR_OK;
+			return INFO_OK;
 
 		// store name (need to copy it, since alc_init is called later,
 		// and it must then still be valid)
@@ -195,7 +195,7 @@ LibError snd_dev_set(const char* alc_new_dev_name)
 	{
 		// already using default device - done. (don't re-init)
 		if(alc_dev_name == 0)
-			return ERR_OK;
+			return INFO_OK;
 
 		alc_dev_name = 0;
 	}
@@ -232,7 +232,7 @@ static void alc_shutdown()
 */
 static LibError alc_init()
 {
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 
 #if WIN_LOADLIBRARY_HACK
 	HMODULE dlls[3];
@@ -346,7 +346,7 @@ LibError snd_set_master_gain(float gain)
 		// position will get sent too.
 		// this isn't called often, so we don't care.
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -561,7 +561,7 @@ LibError snd_set_max_voices(uint limit)
 	if(!al_src_allocated || limit < al_src_allocated)
 	{
 		al_src_cap = limit;
-		return ERR_OK;
+		return INFO_OK;
 	}
 	// user is requesting a cap higher than what we actually allocated.
 	// that's fine (not an error), but we won't set the cap, since it
@@ -569,7 +569,7 @@ LibError snd_set_max_voices(uint limit)
 	// there's no return value to indicate this because the cap is
 	// precisely that - an upper limit only, we don't care if it can't be met.
 	else
-		return ERR_OK;
+		return INFO_OK;
 }
 
 
@@ -591,7 +591,7 @@ static LibError al_init()
 {
 	// only take action on first call, OR when re-initializing.
 	if(al_initialized)
-		return ERR_OK;
+		return INFO_OK;
 
 	RETURN_ERR(alc_init());
 
@@ -601,7 +601,7 @@ static LibError al_init()
 	al_src_init();
 	al_listener_latch();
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -645,7 +645,7 @@ static LibError al_reinit()
 	// not yet initialized. settings have been saved, and will be
 	// applied by the component init routines called from al_init.
 	if(!al_initialized)
-		return ERR_OK;
+		return INFO_OK;
 
 	// re-init (stops all currently playing sounds)
 	al_shutdown();
@@ -682,7 +682,7 @@ LibError snd_dev_prepare_enum()
 		WARN_RETURN(ERR_NO_SYS);
 
 	devs = (const char*)alcGetString(0, ALC_DEVICE_SPECIFIER);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -845,7 +845,7 @@ struct Stream
 static LibError stream_issue(Stream* s)
 {
 	if(s->active_ios >= MAX_IOS)
-		return ERR_OK;
+		return INFO_OK;
 
 	void* buf = io_buf_alloc();
 	if(!buf)
@@ -854,7 +854,7 @@ static LibError stream_issue(Stream* s)
 	Handle h = vfs_io_issue(s->hf, STREAM_BUF_SIZE, buf);
 	RETURN_ERR(h);
 	s->ios[s->active_ios++] = h;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -885,7 +885,7 @@ static LibError stream_buf_get(Stream* s, void*& data, size_t& size)
 
 	// (next stream_buf_discard will free this buffer)
 	s->last_buf = data;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -941,7 +941,7 @@ static LibError stream_open(Stream* s, const char* fn)
 	for(int i = 0; i < MAX_IOS; i++)
 		RETURN_ERR(stream_issue(s));
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -954,7 +954,7 @@ static LibError stream_open(Stream* s, const char* fn)
 */
 static LibError stream_close(Stream* s)
 {
-	LibError ret = ERR_OK;
+	LibError ret = INFO_OK;
 	LibError err;
 
 	// for each pending IO:
@@ -995,7 +995,7 @@ static LibError stream_validate(const Stream* s)
 	if(s->active_ios > MAX_IOS)
 		WARN_RETURN(ERR_1);
 	// <last_buf> has no invariant we could check.
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1123,7 +1123,7 @@ static LibError SndData_reload(SndData* sd, const char* fn, Handle hsd)
 
 		RETURN_ERR(stream_open(&sd->s, fn));
 		sd->is_valid = 1;
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// else: clip
@@ -1175,7 +1175,7 @@ else
 
 	(void)file_buf_free(file);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError SndData_validate(const SndData* sd)
@@ -1190,14 +1190,14 @@ static LibError SndData_validate(const SndData* sd)
 	if(sd->is_stream)
 		RETURN_ERR(stream_validate(&sd->s));
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError SndData_to_string(const SndData* sd, char* buf)
 {
 	const char* type = sd->is_stream? "stream" : "clip";
 	snprintf(buf, H_STRING_LEN, "%s; al_buf=%d", type, sd->al_buf);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1302,7 +1302,7 @@ static void hsd_list_free_all()
 * @param hsd Handle to SndData.
 * @param al_buf buffer name.
 * @return LibError, most commonly:
-* ERR_OK    = buffer has been returned; more are expected to be available.
+* INFO_OK    = buffer has been returned; more are expected to be available.
 * ERR_EOF   = buffer has been returned but is the last one
 *             (end of file reached)
 * ERR_AGAIN = no buffer returned yet; still streaming in ATM.
@@ -1310,7 +1310,7 @@ static void hsd_list_free_all()
 */
 static LibError snd_data_buf_get(Handle hsd, ALuint& al_buf)
 {
-	LibError err = ERR_OK;
+	LibError err = INFO_OK;
 
 	// in case H_DEREF fails
 	al_buf = 0;
@@ -1346,7 +1346,7 @@ static LibError snd_data_buf_get(Handle hsd, ALuint& al_buf)
 	RETURN_ERR(err);
 
 	// al_buf valid and next IO issued successfully.
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1364,11 +1364,11 @@ static LibError snd_data_buf_free(Handle hsd, ALuint al_buf)
 	// clip: no-op (caller will later release hsd reference;
 	// when hsd actually unloads, sd->al_buf will be freed).
 	if(!sd->is_stream)
-		return ERR_OK;
+		return INFO_OK;
 
 	// stream: we had allocated an additional buffer, so free it now.
 	al_buf_free(al_buf);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1638,7 +1638,7 @@ static LibError VSrc_reload(VSrc* vs, const char* fn, Handle hvs)
 	vs->hsd = snd_data_load(snd_fn, is_stream);
 	RETURN_ERR(vs->hsd);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError VSrc_validate(const VSrc* vs)
@@ -1654,13 +1654,13 @@ static LibError VSrc_validate(const VSrc* vs)
 	if(*(u8*)&vs->loop > 1 || *(u8*)&vs->relative > 1)
 		WARN_RETURN(ERR_4);
 	// <static_pri> and <cur_pri> have no invariant we could check.
-	return ERR_OK;
+	return INFO_OK;
 }
 
 static LibError VSrc_to_string(const VSrc* vs, char* buf)
 {
 	snprintf(buf, H_STRING_LEN, "al_src = %d", vs->al_src);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1810,7 +1810,7 @@ static void vsrc_free(VSrc* vs) { snd_free(vs->hvs); }
 static LibError list_free_all()
 {
 	list_foreach(vsrc_free);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1886,14 +1886,14 @@ static double snd_update_time;
 static LibError vsrc_update(VSrc* vs)
 {
 	if(!vs->al_src)
-		return ERR_OK;
+		return INFO_OK;
 
 	FadeRet ret = fade(vs->fade, snd_update_time, vs->gain);
 	// auto-free after fadeout.
 	if(ret == FADE_TO_0_FINISHED)
 	{
 		vsrc_free(vs);
-		return ERR_OK;	// don't continue - <vs> has been freed.
+		return INFO_OK;	// don't continue - <vs> has been freed.
 	}
 	// fade in progress; latch current gain value.
 	else if(ret == FADE_CHANGED)
@@ -1911,7 +1911,7 @@ static LibError vsrc_update(VSrc* vs)
 		if(num_queued == 0)
 		{
 			snd_free(vs->hvs);
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 	// can still read from SndData
@@ -1936,14 +1936,14 @@ static LibError vsrc_update(VSrc* vs)
 			alSourceQueueBuffers(vs->al_src, 1, &al_buf);
 			al_check("vsrc_update alSourceQueueBuffers");
 		}
-		while(to_fill-- && ret == ERR_OK);
+		while(to_fill-- && ret == INFO_OK);
 
 		// SndData has reported that no further buffers are available.
 		if(ret == ERR_EOF)
 			vs->flags |= VS_EOF;
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1958,7 +1958,7 @@ static LibError vsrc_grant(VSrc* vs)
 {
 	// already playing - bail
 	if(vs->al_src)
-		return ERR_OK;
+		return INFO_OK;
 
 	// try to alloc source. if none are available, bail -
 	// we get called in that hope that one is available by snd_play.
@@ -1983,7 +1983,7 @@ static LibError vsrc_grant(VSrc* vs)
 
 	alSourcePlay(vs->al_src);
 	AL_CHECK;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2009,7 +2009,7 @@ static LibError vsrc_reclaim(VSrc* vs)
 	vsrc_deque_finished_bufs(vs);
 
 	al_src_free(vs->al_src);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2044,7 +2044,7 @@ LibError snd_play(Handle hvs, float static_pri)
 	// either we get a source and playing begins immediately,
 	// or it'll be taken care of on next update.
 	vsrc_grant(vs);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2068,7 +2068,7 @@ LibError snd_set_pos(Handle hvs, float x, float y, float z, bool relative)
 	vs->relative = relative;
 
 	vsrc_latch(vs);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2100,7 +2100,7 @@ LibError snd_set_gain(Handle hvs, float gain)
 	vs->gain = gain;
 
 	vsrc_latch(vs);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2125,7 +2125,7 @@ LibError snd_set_pitch(Handle hvs, float pitch)
 	vs->pitch = pitch;
 
 	vsrc_latch(vs);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2153,7 +2153,7 @@ LibError snd_set_loop(Handle hvs, bool loop)
 	vs->loop = loop;
 
 	vsrc_latch(vs);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2211,7 +2211,7 @@ LibError snd_fade(Handle hvs, float initial_gain, float final_gain,
 	(void)fade(fi, cur_time, vs->gain);
 	vsrc_latch(vs);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2301,7 +2301,7 @@ static LibError vm_update()
 	list_foreach(reclaim, first_unimportant, 0);
 	list_foreach(grant, 0, first_unimportant);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2325,7 +2325,7 @@ LibError snd_update(const float* pos, const float* dir, const float* up)
 	// this fails, so report success here (everything will work once
 	// sound is re-enabled).
 	if(!al_initialized)
-		return ERR_OK;
+		return INFO_OK;
 
 	if(pos)
 		al_listener_set_pos(pos, dir, up);
@@ -2336,7 +2336,7 @@ LibError snd_update(const float* pos, const float* dir, const float* up)
 	snd_update_time = get_time();	// see decl
 	list_foreach((void (*)(VSrc*))vsrc_update);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -2383,7 +2383,7 @@ LibError snd_disable(bool disabled)
 	{
 		if(al_initialized)
 			debug_warn("already initialized => disable is pointless");
-		return ERR_OK;
+		return INFO_OK;
 	}
 	else
 		return snd_init();
diff --git a/source/lib/self_test.h b/source/lib/self_test.h
index 5fa38697a3..9c71944da5 100644
--- a/source/lib/self_test.h
+++ b/source/lib/self_test.h
@@ -172,7 +172,7 @@ extern int self_test_register(SelfTestRecord* r);
 // set/cleared by run_self_test.
 extern bool self_test_active;
 
-#define TS_ASSERT_OK(expr) TS_ASSERT_EQUAL((expr), ERR_OK)
+#define TS_ASSERT_OK(expr) TS_ASSERT_EQUAL((expr), INFO_OK)
 #define TS_ASSERT_STR_EQUAL(str1, str2) TS_ASSERT(!strcmp((str1), (str2)))
 
 #endif	// #ifndef SELF_TEST_H__
diff --git a/source/lib/sysdep/ia32.cpp b/source/lib/sysdep/ia32.cpp
index f04b3f9a3d..513f16d78b 100644
--- a/source/lib/sysdep/ia32.cpp
+++ b/source/lib/sysdep/ia32.cpp
@@ -614,7 +614,7 @@ void ia32_get_cpu_info()
 
 
 // checks if there is an IA-32 CALL instruction right before ret_addr.
-// returns ERR_OK if so and ERR_FAIL if not.
+// returns INFO_OK if so and ERR_FAIL if not.
 // also attempts to determine the call target. if that is possible
 // (directly addressed relative or indirect jumps), it is stored in
 // target, which is otherwise 0.
@@ -635,13 +635,13 @@ LibError ia32_get_call_target(void* ret_addr, void** target)
 	if(len >= 5 && c[-5] == 0xE8)
 	{
 		*target = (u8*)ret_addr + *(i32*)(c-4);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// CALL r/m32 (FF /2)
 	// .. CALL [r32 + r32*s]          => FF 14 SIB
 	if(len >= 3 && c[-3] == 0xFF && c[-2] == 0x14)
-		return ERR_OK;
+		return INFO_OK;
 	// .. CALL [disp32]               => FF 15 disp32
 	if(len >= 6 && c[6] == 0xFF && c[-5] == 0x15)
 	{
@@ -649,27 +649,27 @@ LibError ia32_get_call_target(void* ret_addr, void** target)
 		if(!debug_is_pointer_bogus(addr_of_target))
 		{
 			*target = *(void**)addr_of_target;
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 	// .. CALL [r32]                  => FF 00-3F(!14/15)
 	if(len >= 2 && c[-2] == 0xFF && c[-1] < 0x40 && c[-1] != 0x14 && c[-1] != 0x15)
-		return ERR_OK;
+		return INFO_OK;
 	// .. CALL [r32 + r32*s + disp8]  => FF 54 SIB disp8
 	if(len >= 4 && c[-4] == 0xFF && c[-3] == 0x54)
-		return ERR_OK;
+		return INFO_OK;
 	// .. CALL [r32 + disp8]          => FF 50-57(!54) disp8
 	if(len >= 3 && c[-3] == 0xFF && (c[-2] & 0xF8) == 0x50 && c[-2] != 0x54)
-		return ERR_OK;
+		return INFO_OK;
 	// .. CALL [r32 + r32*s + disp32] => FF 94 SIB disp32
 	if(len >= 7 && c[-7] == 0xFF && c[-6] == 0x94)
-		return ERR_OK;
+		return INFO_OK;
 	// .. CALL [r32 + disp32]         => FF 90-97(!94) disp32
 	if(len >= 6 && c[-6] == 0xFF && (c[-5] & 0xF8) == 0x90 && c[-5] != 0x94)
-		return ERR_OK;
+		return INFO_OK;
 	// .. CALL r32                    => FF D0-D7                 
 	if(len >= 2 && c[-2] == 0xFF && (c[-1] & 0xF8) == 0xD0)
-		return ERR_OK;
+		return INFO_OK;
 
 	WARN_RETURN(ERR_CPU_UNKNOWN_OPCODE);
 }
diff --git a/source/lib/sysdep/ia32.h b/source/lib/sysdep/ia32.h
index 59fac412c4..f5f292cf55 100644
--- a/source/lib/sysdep/ia32.h
+++ b/source/lib/sysdep/ia32.h
@@ -137,7 +137,7 @@ extern void ia32_get_current_context(void* pcontext);
 extern void ia32_asm_init();
 
 // checks if there is an IA-32 CALL instruction right before ret_addr.
-// returns ERR_OK if so and ERR_FAIL if not.
+// returns INFO_OK if so and ERR_FAIL if not.
 // also attempts to determine the call target. if that is possible
 // (directly addressed relative or indirect jumps), it is stored in
 // target, which is otherwise 0.
diff --git a/source/lib/sysdep/sysdep.h b/source/lib/sysdep/sysdep.h
index 8dfb4154e0..965bef844f 100644
--- a/source/lib/sysdep/sysdep.h
+++ b/source/lib/sysdep/sysdep.h
@@ -209,7 +209,7 @@ extern LibError sys_clipboard_free(wchar_t* copy);
 //   it is no longer needed and can be freed after this call returns.
 // hotspot (hx,hy) is the offset from its upper-left corner to the
 //   position where mouse clicks are registered.
-// cursor is only valid when ERR_OK is returned; in that case, it must be
+// cursor is only valid when INFO_OK is returned; in that case, it must be
 //   sys_cursor_free-ed when no longer needed.
 extern LibError sys_cursor_create(uint w, uint h, void* bgra_img,
 	uint hx, uint hy, void** cursor);
diff --git a/source/lib/sysdep/win/delay_load.cpp b/source/lib/sysdep/win/delay_load.cpp
index 22505c04d0..e8328c2ecf 100644
--- a/source/lib/sysdep/win/delay_load.cpp
+++ b/source/lib/sysdep/win/delay_load.cpp
@@ -601,7 +601,7 @@ static LibError wdll_shutdown()
 				// changes __puiHead!
 		}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/sysdep/win/dll_ver.cpp b/source/lib/sysdep/win/dll_ver.cpp
index d85f036a69..f8c1064aac 100644
--- a/source/lib/sysdep/win/dll_ver.cpp
+++ b/source/lib/sysdep/win/dll_ver.cpp
@@ -63,7 +63,7 @@ static LibError get_ver(const char* module_path, char* out_ver, size_t out_ver_l
 			if(VerQueryValue(buf, subblock, (void**)&in_ver, &in_ver_len))
 			{
 				strcpy_s(out_ver, out_ver_len, in_ver);
-				ret = ERR_OK;
+				ret = INFO_OK;
 			}
 		}
 	}
@@ -135,7 +135,7 @@ LibError dll_list_add(const char* name)
 	if(len > 0)
 	{
 		dll_list_pos += len;
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// didn't fit; complain
diff --git a/source/lib/sysdep/win/waio.cpp b/source/lib/sysdep/win/waio.cpp
index c14c09e027..6159bad908 100644
--- a/source/lib/sysdep/win/waio.cpp
+++ b/source/lib/sysdep/win/waio.cpp
@@ -258,7 +258,7 @@ static LibError aio_h_set(const int fd, const HANDLE h)
 	aio_hs[fd] = h;
 
 	unlock();
-	return ERR_OK;
+	return INFO_OK;
 
 fail:
 	unlock();
@@ -437,7 +437,7 @@ static LibError req_free(Req* r)
 {
 	debug_assert(r->cb != 0 && "req_free: not currently in use");
 	r->cb = 0;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -598,7 +598,7 @@ static int aio_rw(struct aiocb* cb)
 		ok = TRUE;
 	// .. translate from Win32 result code to POSIX
 	LibError err = LibError_from_win32(ok);
-	if(err == ERR_OK)
+	if(err == INFO_OK)
 		ret = 0;
 	LibError_set_errno(err);
 
@@ -799,7 +799,7 @@ int aio_fsync(int, struct aiocb*)
 static LibError waio_init()
 {
 	req_init();
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -807,5 +807,5 @@ static LibError waio_shutdown()
 {
 	req_cleanup();
 	aio_h_cleanup();
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/sysdep/win/wcpu.cpp b/source/lib/sysdep/win/wcpu.cpp
index f1d81a4db9..79b0561408 100644
--- a/source/lib/sysdep/win/wcpu.cpp
+++ b/source/lib/sysdep/win/wcpu.cpp
@@ -117,7 +117,7 @@ LibError win_get_cpu_info()
 
 	check_speedstep();
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -163,7 +163,7 @@ LibError sys_on_each_cpu(void (*cb)())
 	// restore to original value
 	SetProcessAffinityMask(hProcess, process_affinity);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -315,13 +315,13 @@ LibError prof_start()
 
 	sem_init(&exit_flag, 0, 0);
 	pthread_create(&thread, 0, prof_thread_func, 0);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 LibError prof_shutdown()
 {
 	WARN_IF_FALSE(CloseHandle(prof_target_thread));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/sysdep/win/wdbg.cpp b/source/lib/sysdep/win/wdbg.cpp
index 941f7bddef..366c7aea01 100644
--- a/source/lib/sysdep/win/wdbg.cpp
+++ b/source/lib/sysdep/win/wdbg.cpp
@@ -264,7 +264,7 @@ static const uint MAX_BREAKPOINTS = 4;
 static LibError brk_disable_all_in_ctx(BreakInfo* UNUSED(bi), CONTEXT* context)
 {
 	context->Dr7 &= ~brk_all_local_enables;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -340,7 +340,7 @@ have_reg:
 	context->Dr7 |= LE;
 
 	brk_all_local_enables |= LE;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -369,7 +369,7 @@ static LibError brk_do_request(HANDLE hThread, void* arg)
 		WARN_RETURN(ERR_FAIL);
 
 	RETURN_ERR(ret);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -752,7 +752,7 @@ static LibError wdbg_init(void)
 		pAddVectoredExceptionHandler(TRUE, vectored_exception_handler);
 #endif
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/sysdep/win/wdbg_sym.cpp b/source/lib/sysdep/win/wdbg_sym.cpp
index beadad2140..c7d543df35 100644
--- a/source/lib/sysdep/win/wdbg_sym.cpp
+++ b/source/lib/sysdep/win/wdbg_sym.cpp
@@ -93,7 +93,7 @@ static LibError sym_init()
 	// don't use pthread_once because we need to return success/error code.
 	static uintptr_t already_initialized = 0;
 	if(!CAS(&already_initialized, 0, 1))
-		return ERR_OK;
+		return INFO_OK;
 
 	hProcess = GetCurrentProcess();
 
@@ -120,7 +120,7 @@ static LibError sym_init()
 	IMAGE_NT_HEADERS* header = ImageNtHeader((void*)mod_base);
 	machine = header->FileHeader.Machine;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -128,7 +128,7 @@ static LibError sym_init()
 static LibError sym_shutdown()
 {
 	SymCleanup(hProcess);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -217,7 +217,7 @@ LibError debug_resolve_symbol(void* ptr_of_interest, char* sym_name, char* file,
 	}
 
 	unlock();
-	return (successes != 0)? ERR_OK : ERR_FAIL;
+	return (successes != 0)? INFO_OK : ERR_FAIL;
 }
 
 
@@ -302,7 +302,7 @@ static LibError ia32_walk_stack(STACKFRAME64* sf)
 	sf->AddrPC    .Offset = (DWORD64)target;
 	sf->AddrReturn.Offset = (DWORD64)ret_addr;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 #endif	// #if CPU_IA32 && !CONFIG_OMIT_FP
@@ -416,13 +416,13 @@ static LibError walk_stack(StackFrameCallback cb, void* user_arg = 0, uint skip
 			0, SymFunctionTableAccess64, SymGetModuleBase64, 0);
 		// note: don't use LibError_from_win32 because it raises a warning,
 		// and this "fails" commonly (when no stack frames are left).
-		err = ok? ERR_OK : ERR_FAIL;
+		err = ok? INFO_OK : ERR_FAIL;
 #endif
 
 		// no more frames found - abort. note: also test FP because
 		// StackWalk64 sometimes erroneously reports success.
 		void* fp = (void*)(uintptr_t)sf.AddrFrame .Offset;
-		if(err != ERR_OK || !fp)
+		if(err != INFO_OK || !fp)
 			return ret;
 
 		if(skip)
@@ -454,7 +454,7 @@ static LibError nth_caller_cb(const STACKFRAME64* sf, void* user_arg)
 
 	// return its address
 	*pfunc = (void*)sf->AddrPC.Offset;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -477,7 +477,7 @@ void* debug_get_nth_caller(uint skip, void* pcontext)
 	LibError err = walk_stack(nth_caller_cb, &func, skip, (const CONTEXT*)pcontext);
 
 	unlock();
-	return (err == ERR_OK)? func : 0;
+	return (err == INFO_OK)? func : 0;
 }
 
 
@@ -617,7 +617,7 @@ static LibError out_check_limit()
 	}
 
 	// no limit hit, proceed normally
-	return ERR_OK;
+	return INFO_OK;
 }
 
 //----------------------------------------------------------------------------
@@ -773,7 +773,7 @@ static LibError dump_string(const u8* p, size_t el_size)
 	}
 
 	out(L"\"%s\"", buf);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -817,7 +817,7 @@ static LibError dump_sequence(DebugIterator el_iterator, void* internal,
 		el_p = el_iterator(internal, el_size);
 
 		LibError ret = dump_string(el_p, el_size);
-		if(ret == ERR_OK)
+		if(ret == INFO_OK)
 			return ret;
 	}
 
@@ -847,7 +847,7 @@ static LibError dump_sequence(DebugIterator el_iterator, void* internal,
 			continue;
 		}
 
-		dump_error(err, el_p);	// nop if err == ERR_OK
+		dump_error(err, el_p);	// nop if err == INFO_OK
 		// add separator unless this is the last element (can't just
 		// erase below due to additional "...").
 		if(i != num_elements_to_show-1)
@@ -864,7 +864,7 @@ static LibError dump_sequence(DebugIterator el_iterator, void* internal,
 	state.level--;
 	if(fits_on_one_line)
 		out(L" }");
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -902,7 +902,7 @@ static LibError determine_symbol_address(DWORD id, DWORD UNUSED(type_id), const
 		// pp is already correct (udt_dump_normal retrieved the offset;
 		// we do it that way so we can check it against the total
 		// UDT size for safety).
-		return ERR_OK;
+		return INFO_OK;
 
 	// this symbol is defined as static in another module =>
 	// there's nothing we can do.
@@ -977,7 +977,7 @@ in_register:
 
 debug_printf("SYM| %ws at %p  flags=%X dk=%d sym->addr=%I64X addrofs=%X addr2=%I64X ofs2=%X\n", sym->Name, *pp, sym->Flags, data_kind, sym->Address, addrofs, addr2, ofs2);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1157,7 +1157,7 @@ display_as_hex:
 			out(L" ('%hc')", c);
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1258,7 +1258,7 @@ static LibError dump_sym_enum(DWORD type_id, const u8* p, DumpState UNUSED(state
 				WARN_RETURN(ERR_SYM_TYPE_INFO_UNAVAILABLE);
 			out(L"%s", name);
 			LocalFree((HLOCAL)name);
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 
@@ -1267,7 +1267,7 @@ static LibError dump_sym_enum(DWORD type_id, const u8* p, DumpState UNUSED(state
 	// note: could goto here after a SGTI fails, but we fail instead
 	// to make sure those errors are noticed.
 	out(L"%I64d", enum_value);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1296,9 +1296,9 @@ static LibError dump_sym_function_type(DWORD UNUSED(type_id), const u8* p, DumpS
 	lock();
 
 	out(L"0x%p", p);
-	if(err == ERR_OK)
+	if(err == INFO_OK)
 		out(L" (%hs)", name);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1346,13 +1346,13 @@ static LibError dump_sym_pointer(DWORD type_id, const u8* p, DumpState state)
 	// bail if it's obvious the pointer is bogus
 	// (=> can't display what it's pointing to)
 	if(debug_is_pointer_bogus(p))
-		return ERR_OK;
+		return INFO_OK;
 
 	// avoid duplicates and circular references
 	if(ptr_already_visited(p))
 	{
 		out(L" (see above)");
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// display what the pointer is pointing to.
@@ -1420,7 +1420,7 @@ static LibError udt_get_child_type(const wchar_t* child_name,
 
 		*el_type_id = type_id;
 		*el_size = (size_t)size;
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// (happens if called for containers that are treated as STL but are not)
@@ -1452,14 +1452,14 @@ static LibError udt_dump_std(const wchar_t* wtype_name, const u8* p, size_t size
 	DWORD el_type_id;
 	size_t el_size;
  	err = udt_get_child_type(L"value_type", num_children, children, &el_type_id, &el_size);
-	if(err != ERR_OK)
+	if(err != INFO_OK)
 		goto not_valid_container;
 	// .. get iterator and # elements
 	size_t el_count;
 	DebugIterator el_iterator;
 	u8 it_mem[DEBUG_STL_MAX_ITERATOR_SIZE];
 	err = stl_get_container_info(ctype_name, p, size, el_size, &el_count, &el_iterator, it_mem);
-	if(err != ERR_OK)
+	if(err != INFO_OK)
 		goto not_valid_container;
 	return dump_sequence(el_iterator, it_mem, el_count, el_type_id, el_size, state);
 not_valid_container:
@@ -1486,7 +1486,7 @@ not_valid_container:
 		text = buf;
 	}
 	out(L"(%hs%hs)", text, stl_simplify_name(ctype_name));
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1554,7 +1554,7 @@ static LibError udt_dump_suppressed(const wchar_t* type_name, const u8* UNUSED(p
 	// (otherwise, lack of output may be taken for an error)
 	out(L" (..)");
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1632,7 +1632,7 @@ static LibError udt_dump_normal(const wchar_t* type_name, const u8* p, size_t si
 		}
 
 		displayed_anything = true;
-		dump_error(err, el_p);	// nop if err == ERR_OK
+		dump_error(err, el_p);	// nop if err == INFO_OK
 		out(fits_on_one_line? L", " : L"\r\n");
 
 		if(err == ERR_SYM_SINGLE_SYMBOL_LIMIT)
@@ -1645,7 +1645,7 @@ static LibError udt_dump_normal(const wchar_t* type_name, const u8* p, size_t si
 	{
 		out_erase(2);	// "{ " or "\r\n"
 		out(L"(%s)", type_name);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// remove trailing comma separator
@@ -1657,7 +1657,7 @@ static LibError udt_dump_normal(const wchar_t* type_name, const u8* p, size_t si
 		out(L" }");
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1726,7 +1726,7 @@ static LibError dump_sym_unknown(DWORD type_id, const u8* UNUSED(p), DumpState U
 
 	debug_printf("SYM| unknown tag: %d\n", type_tag);
 	out(L"(unknown symbol type)");
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1837,7 +1837,7 @@ static LibError dump_frame_cb(const STACKFRAME64* sf, void* UNUSED(user_arg))
 		// an alternative would be to check if module=kernel32, but
 		// that would cut off callbacks as well.
 		if(!strcmp(func_name, "_BaseProcessStart@4"))
-			return ERR_OK;
+			return INFO_OK;
 
 		out(L"%hs (%hs:%d)\r\n", func_name, file, line);
 	}
diff --git a/source/lib/sysdep/win/wdir_watch.cpp b/source/lib/sysdep/win/wdir_watch.cpp
index 5c1bc04634..8022bb0ffa 100644
--- a/source/lib/sysdep/win/wdir_watch.cpp
+++ b/source/lib/sysdep/win/wdir_watch.cpp
@@ -168,7 +168,7 @@ static LibError wdir_watch_shutdown()
 		delete it->second;
 	watches.clear();
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -268,7 +268,7 @@ LibError dir_add_watch(const char* dir, intptr_t* _reqnum)
 	}
 
 done:
-	err = ERR_OK;
+	err = INFO_OK;
 	*_reqnum = reqnum;
 
 fail:
@@ -290,7 +290,7 @@ LibError dir_cancel_watch(const intptr_t reqnum)
 	// we're freeing a reference - done.
 	debug_assert(w->refs >= 1);
 	if(--w->refs != 0)
-		return ERR_OK;
+		return INFO_OK;
 
 	// contrary to dox, the RDC IOs do not issue a completion notification.
 	// no packet was received on the IOCP while or after cancelling in a test.
@@ -375,7 +375,7 @@ static void get_packet()
 
 
 // if a file change notification is pending, store its filename in <fn> and
-// return ERR_OK; otherwise, return ERR_AGAIN ('none currently pending') or
+// return INFO_OK; otherwise, return ERR_AGAIN ('none currently pending') or
 // a negative error code.
 // <fn> must hold at least PATH_MAX chars.
 LibError dir_get_changed_file(char* fn)
@@ -391,5 +391,5 @@ LibError dir_get_changed_file(char* fn)
 	strcpy_s(fn, PATH_MAX, fn_s.c_str());
 	pending_events.pop_front();
 
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/sysdep/win/wgfx.cpp b/source/lib/sysdep/win/wgfx.cpp
index e5abfc17c0..ebb6dc8f97 100644
--- a/source/lib/sysdep/win/wgfx.cpp
+++ b/source/lib/sysdep/win/wgfx.cpp
@@ -56,7 +56,7 @@ LibError gfx_get_video_mode(int* xres, int* yres, int* bpp, int* freq)
 	if(dm.dmFields & (DWORD)DM_DISPLAYFREQUENCY && freq)
 		*freq = (int)dm.dmDisplayFrequency;
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -69,7 +69,7 @@ LibError gfx_get_monitor_size(int& width_mm, int& height_mm)
 	width_mm = GetDeviceCaps(dc, HORZSIZE);
 	height_mm = GetDeviceCaps(dc, VERTSIZE);
 	ReleaseDC(0, dc);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -93,7 +93,7 @@ static LibError import_EnumDisplayDevices()
 		// so this resource leak is unavoidable.
 	}
 
-	return pEnumDisplayDevicesA? ERR_OK : ERR_FAIL;
+	return pEnumDisplayDevicesA? INFO_OK : ERR_FAIL;
 }
 
 
@@ -120,7 +120,7 @@ static LibError win_get_gfx_card()
 			if(dd.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
 			{
 				strcpy_s(gfx_card, ARRAY_SIZE(gfx_card), (const char*)dd.DeviceString);
-				return ERR_OK;
+				return INFO_OK;
 			}
 		}
 	}
@@ -214,5 +214,5 @@ LibError win_get_gfx_info()
 	// don't exit before trying both
 	RETURN_ERR(err1);
 	RETURN_ERR(err2);
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/sysdep/win/win.cpp b/source/lib/sysdep/win/win.cpp
index 8e522699dc..9255accef8 100644
--- a/source/lib/sysdep/win/win.cpp
+++ b/source/lib/sysdep/win/win.cpp
@@ -75,7 +75,7 @@ static LibError LibError_from_GLE(bool warn_if_failed = true)
 LibError LibError_from_win32(DWORD ret, bool warn_if_failed)
 {
 	if(ret != FALSE)
-		return ERR_OK;
+		return INFO_OK;
 	return LibError_from_GLE(warn_if_failed);
 }
 
diff --git a/source/lib/sysdep/win/wposix.cpp b/source/lib/sysdep/win/wposix.cpp
index 93ecf1d8a3..dc89a76617 100644
--- a/source/lib/sysdep/win/wposix.cpp
+++ b/source/lib/sysdep/win/wposix.cpp
@@ -626,7 +626,7 @@ static LibError mmap_mem(void* start, size_t len, int prot, int flags, int fd, v
 			*pp = 0;
 			// make sure *pp won't be misinterpreted as an error
 			cassert(MAP_FAILED != 0);
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 
@@ -636,7 +636,7 @@ static LibError mmap_mem(void* start, size_t len, int prot, int flags, int fd, v
 	if(!p)
 		WARN_RETURN(ERR_NO_MEM);
 	*pp = p;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -673,7 +673,7 @@ static LibError mmap_file_access(int prot, int flags, DWORD& flProtect, DWORD& d
 		}
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -721,7 +721,7 @@ static LibError mmap_file(void* start, size_t len, int prot, int flags,
 
 	WIN_RESTORE_LAST_ERROR;
 	*pp = p;
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/sysdep/win/wsdl.cpp b/source/lib/sysdep/win/wsdl.cpp
index 4353ad35ff..7d88f15f31 100644
--- a/source/lib/sysdep/win/wsdl.cpp
+++ b/source/lib/sysdep/win/wsdl.cpp
@@ -97,7 +97,7 @@ static LibError calc_gamma_ramp(float gamma, u16* ramp)
 	{
 		for(u16 i = 0; i < 256; i++)
 			ramp[i] = (i << 8);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	const double inv_gamma = 1.0 / gamma;
@@ -110,7 +110,7 @@ static LibError calc_gamma_ramp(float gamma, u16* ramp)
 		ramp[i] = fp_to_u16(pow(frac, inv_gamma));
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -142,7 +142,7 @@ int SDL_SetGamma(float r, float g, float b)
 	LibError err1 = calc_gamma_ramp(r, cur_ramp[0]);
 	LibError err2 = calc_gamma_ramp(g, cur_ramp[1]);
 	LibError err3 = calc_gamma_ramp(b, cur_ramp[2]);
-	if(err1 != ERR_OK || err2 != ERR_OK || err3 != ERR_OK)
+	if(err1 != INFO_OK || err2 != INFO_OK || err3 != INFO_OK)
 		return -1;
 
 	if(!SetDeviceGammaRamp(hDC, cur_ramp))
@@ -1265,7 +1265,7 @@ static LibError wsdl_init()
 
 	enable_kbd_hook(true);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -1283,7 +1283,7 @@ static LibError wsdl_shutdown()
 
 	enable_kbd_hook(false);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/sysdep/win/wsnd.cpp b/source/lib/sysdep/win/wsnd.cpp
index 2402680b9c..52d9c862a1 100644
--- a/source/lib/sysdep/win/wsnd.cpp
+++ b/source/lib/sysdep/win/wsnd.cpp
@@ -86,19 +86,19 @@ static LibError add_if_oal_dll(const DirEnt* ent, PathPackage* pp, StringSet* dl
 
 	// skip non-files.
 	if(!DIRENT_IS_DIR(ent))
-		return ERR_OK;
+		return INFO_OK;
 
 	// skip if not an OpenAL DLL.
 	const size_t len = strlen(fn);
 	const bool oal = len >= 7 && !stricmp(fn+len-7, "oal.dll");
 	const bool openal = strstr(fn, "OpenAL") != 0;
 	if(!oal && !openal)
-		return ERR_OK;
+		return INFO_OK;
 
 	// skip if already in StringSet (i.e. has already been dll_list_add-ed)
 	std::pair<StringSet::iterator, bool> ret = dlls->insert(fn);
 	if(!ret.second)	// insert failed - element already there
-		return ERR_OK;
+		return INFO_OK;
 
 	RETURN_ERR(path_package_append_file(pp, fn));
 	return dll_list_add(pp->path);
@@ -123,13 +123,13 @@ static LibError add_oal_dlls_in_dir(const char* dir, StringSet* dlls)
 	for(;;)	// instead of while to avoid warning
 	{
 		LibError err = dir_next_ent(&d, &ent);
-		if(err != ERR_OK)
+		if(err != INFO_OK)
 			break;
 		(void)add_if_oal_dll(&ent, &pp, dlls);
 	}
 
 	(void)dir_close(&d);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -169,7 +169,7 @@ LibError win_get_snd_info()
 	{
 		strcpy_s(snd_card, SND_CARD_LEN, "(none)");
 		strcpy_s(snd_drv_ver, SND_DRV_VER_LEN, "(none)");
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	// find all DLLs related to OpenAL, retrieve their versions,
@@ -179,5 +179,5 @@ LibError win_get_snd_info()
 	StringSet dlls;	// ensures uniqueness
 	(void)add_oal_dlls_in_dir(win_exe_dir, &dlls);
 	(void)add_oal_dlls_in_dir(win_sys_dir, &dlls);
-	return ERR_OK;
+	return INFO_OK;
 }
diff --git a/source/lib/sysdep/win/wsock.cpp b/source/lib/sysdep/win/wsock.cpp
index 036fb33192..ec4f081011 100644
--- a/source/lib/sysdep/win/wsock.cpp
+++ b/source/lib/sysdep/win/wsock.cpp
@@ -63,7 +63,7 @@ static LibError wsock_init()
 			debug_warn("WSAStartup failed");
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 WDLL_LOAD_NOTIFY("ws2_32", wsock_init);
@@ -82,7 +82,7 @@ static LibError wsock_shutdown()
 	while(dll_refs-- > 0)
 		FreeLibrary(hWs2_32Dll);
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/lib/sysdep/win/wsysdep.cpp b/source/lib/sysdep/win/wsysdep.cpp
index 198dda4935..935f892ccb 100644
--- a/source/lib/sysdep/win/wsysdep.cpp
+++ b/source/lib/sysdep/win/wsysdep.cpp
@@ -378,7 +378,7 @@ LibError sys_clipboard_set(const wchar_t* text)
 		GlobalUnlock(hMem);
 
 		if(SetClipboardData(CF_UNICODETEXT, hMem) != 0)
-			err = ERR_OK;
+			err = INFO_OK;
 	}
 	}
 
@@ -432,7 +432,7 @@ wchar_t* sys_clipboard_get()
 LibError sys_clipboard_free(wchar_t* copy)
 {
 	free(copy);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -468,7 +468,7 @@ static HCURSOR HCURSOR_from_ptr(void* p)
 //   it is no longer needed and can be freed after this call returns.
 // hotspot (hx,hy) is the offset from its upper-left corner to the
 //   position where mouse clicks are registered.
-// cursor is only valid when ERR_OK is returned; in that case, it must be
+// cursor is only valid when INFO_OK is returned; in that case, it must be
 //   sys_cursor_free-ed when no longer needed.
 LibError sys_cursor_create(uint w, uint h, void* bgra_img,
 	uint hx, uint hy, void** cursor)
@@ -501,7 +501,7 @@ LibError sys_cursor_create(uint w, uint h, void* bgra_img,
 		WARN_RETURN(ERR_FAIL);
 
 	*cursor = ptr_from_HICON(hIcon);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 LibError sys_cursor_create_empty(void **cursor)
@@ -521,7 +521,7 @@ LibError sys_cursor_set(void* cursor)
 	(void)SetCursor(HCURSOR_from_ptr(cursor));
 	// return value (previous cursor) is useless.
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -531,7 +531,7 @@ LibError sys_cursor_free(void* cursor)
 {
 	// bail now to prevent potential confusion below; there's nothing to do.
 	if(!cursor)
-		return ERR_OK;
+		return INFO_OK;
 
 	// if the cursor being freed is active, restore the default arrow
 	// (just for safety).
@@ -564,7 +564,7 @@ LibError sys_error_description_r(int err, char* buf, size_t max_chars)
 	if(!chars_output)
 		WARN_RETURN(ERR_FAIL);
 	debug_assert(chars_output < max_chars);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -596,7 +596,7 @@ wchar_t* sys_get_module_filename(void* addr, wchar_t* path)
 inline LibError sys_get_executable_name(char* n_path, size_t buf_size)
 {
 	DWORD nbytes = GetModuleFileName(0, n_path, (DWORD)buf_size);
-	return nbytes? ERR_OK : ERR_FAIL;
+	return nbytes? INFO_OK : ERR_FAIL;
 }
 
 
diff --git a/source/lib/sysdep/win/wtime.cpp b/source/lib/sysdep/win/wtime.cpp
index 6d31230556..295a50f8fb 100644
--- a/source/lib/sysdep/win/wtime.cpp
+++ b/source/lib/sysdep/win/wtime.cpp
@@ -199,7 +199,7 @@ static LibError choose_impl()
 			hrt_impl = HRT_TSC;
 			hrt_nominal_freq = cpu_freq;
 			hrt_res = (1.0 / hrt_nominal_freq);
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 #endif	// TSC
@@ -258,7 +258,7 @@ static LibError choose_impl()
 			hrt_impl = HRT_QPC;
 			hrt_nominal_freq = (double)qpc_freq;
 			hrt_res = (1.0 / hrt_nominal_freq);
-			return ERR_OK;
+			return INFO_OK;
 		}
 	}
 #endif	// QPC
@@ -279,7 +279,7 @@ static LibError choose_impl()
 		DWORD timer_period;	// [hectonanoseconds]
 		if(GetSystemTimeAdjustment(&adj, &timer_period, &adj_disabled))
 			hrt_res = (timer_period / 1e7);
-		return ERR_OK;
+		return INFO_OK;
 	}
 
 	hrt_impl = HRT_NONE;
@@ -393,7 +393,7 @@ static LibError reset_impl_lk()
 		hrt_cal_ticks = ticks_lk();
 	}
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -597,7 +597,7 @@ static inline LibError init_calibration_thread()
 {
 	sem_init(&exit_flag, 0, 0);
 	pthread_create(&thread, 0, calibration_thread, 0);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -606,7 +606,7 @@ static inline LibError shutdown_calibration_thread()
 	sem_post(&exit_flag);
 	pthread_join(thread, 0);
 	sem_destroy(&exit_flag);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -741,7 +741,7 @@ static LibError wtime_init()
 	// first call latches start times
 	time_ns();
 
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
diff --git a/source/main.cpp b/source/main.cpp
index 511793a306..b6264e43cc 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -100,7 +100,7 @@ static bool ProgressiveBuildArchive()
 	}
 	else if(ret < 0)
 		DISPLAY_ERROR(L"Archive build failed");
-	else if(ret == ERR_OK)
+	else if(ret == INFO_OK)
 		g_GUI.SendEventToAll("archivebuildercomplete");
 	// in progress
 	else
@@ -123,7 +123,7 @@ static int ProgressiveLoad()
 	switch(ret)
 	{
 		// no load active => no-op (skip code below)
-	case ERR_OK:
+	case INFO_OK:
 		return 0;
 		// current task didn't complete. we only care about this insofar as the
 		// load process is therefore not yet finished.
diff --git a/source/ps/CVFSFile.cpp b/source/ps/CVFSFile.cpp
index c7f89de7bc..d51916b7b4 100644
--- a/source/ps/CVFSFile.cpp
+++ b/source/ps/CVFSFile.cpp
@@ -26,7 +26,7 @@ PSRETURN CVFSFile::Load(const char* filename, uint flags /* = 0 */)
 	}
 
 	LibError ret = vfs_load(filename, m_Buffer, m_BufferSize, flags);
-	if (ret != ERR_OK)
+	if (ret != INFO_OK)
 	{
 		LOG(ERROR, LOG_CATEGORY, "CVFSFile: file %s couldn't be opened (vfs_load: %d)", filename, ret);
 		return PSRETURN_CVFSFile_LoadFailed;
diff --git a/source/ps/ConfigDB.cpp b/source/ps/ConfigDB.cpp
index ae7d342e9d..efad53d751 100644
--- a/source/ps/ConfigDB.cpp
+++ b/source/ps/ConfigDB.cpp
@@ -251,7 +251,7 @@ bool CConfigDB::Reload(EConfigNamespace ns)
 	{
 		// Open file with VFS
 		ret = vfs_load(m_ConfigFile[ns], buffer, buflen);
-		if(ret != ERR_OK)
+		if(ret != INFO_OK)
 		{
 			LOG(ERROR, LOG_CATEGORY, "vfs_load for \"%s\" failed: return was %lld", m_ConfigFile[ns].c_str(), ret);
 			return false;
@@ -259,7 +259,7 @@ bool CConfigDB::Reload(EConfigNamespace ns)
 	}
 	else
 	{
-		if (file_open(m_ConfigFile[ns], 0, &f)!=ERR_OK)
+		if (file_open(m_ConfigFile[ns], 0, &f)!=INFO_OK)
 		{
 			LOG(ERROR, LOG_CATEGORY, "file_open for \"%s\" failed", m_ConfigFile[ns].c_str());
 			return false;
diff --git a/source/ps/Loader.cpp b/source/ps/Loader.cpp
index 82db2a0152..1dc190a73a 100644
--- a/source/ps/Loader.cpp
+++ b/source/ps/Loader.cpp
@@ -91,7 +91,7 @@ LibError LDR_BeginRegistering()
 
 	state = REGISTERING;
 	load_requests.clear();
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -116,7 +116,7 @@ LibError LDR_Register(LoadFunc func, void* param, const wchar_t* description,
 
 	const LoadRequest lr(func, param, description, estimated_duration_ms);
 	load_requests.push_back(lr);
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -134,7 +134,7 @@ LibError LDR_EndRegistering()
 	estimated_duration_tally = 0.0;
 	task_elapsed_time = 0.0;
 	total_estimated_duration = std::accumulate(load_requests.begin(), load_requests.end(), 0.0, DurationAdder());
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -152,7 +152,7 @@ LibError LDR_Cancel()
 	// the queue doesn't need to be emptied now; that'll happen during the
 	// next LDR_StartRegistering. for now, it is sufficient to set the
 	// state, so that LDR_ProgressiveLoad is a no-op.
-	return ERR_OK;
+	return INFO_OK;
 }
 
 
@@ -217,7 +217,7 @@ LibError LDR_ProgressiveLoad(double time_budget, wchar_t* description,
 	// we're called unconditionally from the main loop, so this isn't
 	// an error; there is just nothing to do.
 	if(state != LOADING)
-		return ERR_OK;
+		return INFO_OK;
 
 	while(!load_requests.empty())
 	{
@@ -320,11 +320,11 @@ LibError LDR_NonprogressiveLoad()
 		LibError ret = LDR_ProgressiveLoad(time_budget, description, ARRAY_SIZE(description), &progress_percent);
 		switch(ret)
 		{
-		case ERR_OK:
+		case INFO_OK:
 			debug_warn("No load in progress");
-			return ERR_OK;
+			return INFO_OK;
 		case INFO_ALL_COMPLETE:
-			return ERR_OK;
+			return INFO_OK;
 		case ERR_TIMED_OUT:
 			break;			// continue loading
 		default:
diff --git a/source/ps/XML/XMLUtils.cpp b/source/ps/XML/XMLUtils.cpp
index 917c55ca8f..e4df92844f 100644
--- a/source/ps/XML/XMLUtils.cpp
+++ b/source/ps/XML/XMLUtils.cpp
@@ -52,7 +52,7 @@ XMLCh *XMLTranscode(const char *str)
 int CVFSInputSource::OpenFile(const char *path, uint flags = 0)
 {
 	LibError ret = vfs_load(path, m_pBuffer, m_BufferSize, flags);
-	if(ret != ERR_OK)
+	if(ret != INFO_OK)
 	{
 		LOG(ERROR, LOG_CATEGORY, "CVFSInputSource: file %s couldn't be loaded (vfs_load: %d)", path, ret);
 		return -1;
diff --git a/source/scripting/ScriptingHost.cpp b/source/scripting/ScriptingHost.cpp
index 5ed93238f8..2dd8d0ee30 100644
--- a/source/scripting/ScriptingHost.cpp
+++ b/source/scripting/ScriptingHost.cpp
@@ -115,7 +115,7 @@ void ScriptingHost::RunScript(const CStr& filename, JSObject* globalObject)
 
 	FileIOBuf buf;
 	size_t size;
-	if(vfs_load(fn, buf, size) != ERR_OK)	// ERRTODO: translate/pass it on
+	if(vfs_load(fn, buf, size) != INFO_OK)	// ERRTODO: translate/pass it on
 		throw PSERROR_Scripting_LoadFile_OpenFailed();
 
 	const char* script = (const char*)buf;
diff --git a/source/sound/CMusicPlayer.cpp b/source/sound/CMusicPlayer.cpp
index 6f459e3a94..f6548e5b4d 100644
--- a/source/sound/CMusicPlayer.cpp
+++ b/source/sound/CMusicPlayer.cpp
@@ -42,7 +42,7 @@ void CMusicPlayer::open(char* UNUSED(filename))
 /*
 	void* p;
 	size_t sizeOfFile;
-	if(vfs_load(filename, p, sizeOfFile) != ERR_OK)
+	if(vfs_load(filename, p, sizeOfFile) != INFO_OK)
 	{
 		LOG(ERROR, LOG_CATEGORY, "CMusicPlayer::open(): vfs_load for %s failed!\n", filename);
 		return;