i made a map i figured out the problem but i dont know why it crashes.
whenever i put p6 units it crashes. when i dont it doesnt.
can anyone figure out why?
What's player 6 set as? Human? Neutral? Does player 6 have a start location? What race is he set as? Zerg? Terran?
make sure none of the p6 units go off the map (the gateway and stargate)

Check your triggers (if you have any) sometimes starcraft will crash with an impossible trigger. Look for any mistaken triggers or just re-do the triggers (just to be safe)...oh and i rule

it still crashes. P6 P7 P8 are set as comps.
i tried moveing the gateway to the left of the hives but it still crashes.
it also crashed me when i was using P8 buildings too...
ADDITION: the triggers i have are flawless also.
woot woot neo rules i made it not crash WOOT NEO RULES, i deserve a map maker upgrade, lol

Yes the problem was the units at the top that were placed half on and off the map. I'm sure LegacyWeapon already told you. Also, NeoNightmareX, that guy was capable of making the change himself.
many people make the mistake of putting units off the edge of the map becuase the editor allows them to
this is one of the largest reasons for undefined (not known) crashing