Hi,I had the same problem, I solved it copying all files and folders from sourcesdk/bin/orangebox/bin into sourcesdk/bin. (You can replace the folders filters, phonomeextractors, ect. because they are empty.)
It seems that Valve hasn't updated the buildsdkshaders.bat and the compiling scripts for the orange box.
Maybe you have to copy all files from sourcesdk/bin/ep1/bin but then I encountered a problem.
Maybe someone can help me, becuase I have another problem. Compiling works fine but when I run Half-Life console says that Post_Sepia is a unknown shader so I think there's a problem with the game_shader_dx9.dll.
Any ideas?
Davias
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