Well... my map started crashing me when i build a marine(wall selector)
Here's the chain of events that happens once you buy a marine:
Marine bought -> Marine Removed -> Selector and target created
I stuck a Never(); trigger in the 'create wall selector' trigger, to see if that was the problem. It wasn't, so now i'm stuck with another bug in the map. Btw this WAS working, until i edited the intro text and a couple of unit names. Someone please help me with this, so I can finally finish this map.