I was making a multiplayer map called Mail_depot aabout a week ago, when i made created a "portal clipped away from brush" error, which i fixed by deleting the offending brushes.
Now, when i compile the map, i get a "mail_depot.bsp Version 0 should be 30" occuring, and the map doesnt load.
This occurs whenever i compile a map, not just mail_depot, how do i fix it - as i cannot compile maps at all due to it...
Also - what causes it exactly?