I am just trying to open "Model Viewer", but then I get that error saying:
"unable to load manifest file" - scripts/game_sounds_manifest.txt
Btw, this only happens when I have selected the HL2:Ep1 engine version and HL2-DM. If I select HL2 instead of HL2-DM then it doesn't spit that error, but it doesn't open Model Viewer either.
It works fine if I select the Orange Box engine v. though.
It seems this problem is very specific to HL2-DM
I have already tried "Refreshing SDK Content" and "Reset Game Configurations" from the Source SDK window without avail

Any ideas?
I have no idea how to extract files from the gfc files, so in case you suggest that please explain how
Thanks in advance,
DPC


- I did perform a search in my steamapps folder.


