Source SDK won't work

[Billtcm]

Hi last night Source SDK was just working fine, I was making a map and everything worked great. Today when I got home I tried to turn on the sdk and I got this "MountFilesystem( 221 ) failed: SteamMountFilesystem(3900,221,0x3dafbfc=,0x3dafd0c)failed with error 116: Cache need repair" I looked around a few forums but I couldn't find anything on it. If you can help me, thank you

 

[Billtcm]

Nevermind, Half-Life 2 just verified my game files and now it works again, weird

 

[SenorDingDong]

same thing just happened to me..

 

[MadDog31]

Bookmark this page everybody...helped me out when I had the same error.