Map crashes with more than 3

I have an unusual problem with my map.

If there are more than 3 players, it crashes (just quits the game with no message) within about 10 secs after map is loaded

I am about to start pulling it apart to see if I can isolate the problem, but I just thought I'd see if anyone had any ideas...

Be more specific, like what kinda triggers do you have?

Post the map, ill try to fix it.