What's with the unpure client message?

[old.JigglyButt]

Sometimes when I join a multiplayer game, I get the 'Unpure client detected. Invalid .PK3 files referenced.' message, and then EF restarts.

Aside from the fact that it should be "IMpure", what does it really mean? How do I fix this problem? Is it my map that's bad or what? These are maps that work ok elsewhere...

 

[Starman]

This error means, one of the following:

1) That you have maps/skins/models that the server doesnt have.

2) If have been editing the pk3 files.

3) If are using cheats.

Most ppl have the first one, please move/del the files out of the baseef dir.

thanks,
Starman