[Crash] Engine crashes randomly after a few minutes in playmode. "Unknown Exception - First/Second chance"

Hi guys,
I got a problem with one of our levels. After a random time (most between 1-5 mins), the engine crashes while playing. I cant figure out whats causing it, because it doenst say anything usefull (at least to me) and it happens while doing different things.
I tried to get a clean copy of the game and the engine, cleared the data cache, tried to delete stuff step by step - nothing worked. Since googling didnt help, im asking here.

Thank you very much!

Ps: English is not my native language, im sorry :slight_smile:

nobody had this before? getting really frustrating, got no idea whats causing it

try posting it on fourms and see if you get help