GMod Crashing: Cache Needs Decryption

[Hunter_8472]

When I run GMod 8 v.3b, the screen goes black, as usual, before minimizing and confronting me with the following message:

"MountFilesystem( 242 ) failed: SteamMountFilesystem(1332,242,0x146fbfc=,0146fd0c) failed with error 114: Cache needs decryption"

After OKing this dialogue box, I get the "memory cannot be "read"" message. I had the same prob with v.3a, so I thought maybe a newer version would work. How do I solve this problem?

 

[Solaris]

Dont play garrys mod = Solution

I get that sometimes, get the new one.

 

[Hunter_8472]

This version is the new one. As I said, I downloaded it to replace the older version, which was crashing just like the new version.

 

[G-Dub]

Tried validating the files? You have any problems with HL2 DM?

 

[diluted]

You have to decrypt and play HL2, HL2DM, and CSS (at least once) before you can play Gmod, because Gmod needs the files from those games to be able to run.

 

[Hunter_8472]

Thanks, Diluted! It's running fine now.