"Building Path" crash

[Neveos]

Somehow I fixed it by doing the "ucc make" compiling thing, but sometimes the editor will crash when attempting to build "AI Paths". I don't even know what it is, nor do I really have any "AI pathing" going on at the moment. Anybody know why the editor would be crashing? For some reason if I built paths in a dx map, and then built paths in my map, it didn't crash. What made me decide to try recompiling was: I began playing the original game, and stuff was working despite the fact that I had changed the player-character... like it changed back to JC rather than Alex. Next time it happens, I'll post the error msg.