Cannot load library client

From Valve Developer Community

You receive this error if your mod's bin folder does not contain the dlls; it also occurs if you do not mount the folder sourcetest in gameinfo.txt if you are using appid 215.

[edit]

Fix

Do these changes in <MOD FOLDER>/gameinfo.txt.

[edit]

After

			Game				hl2
[edit]

Add

			Game				sourcetest
Retrieved from "http://developer.valvesoftware.com/wiki/Cannot_load_library_client"