When I load a certain level in my game, a message appears that says "Crash in Event".

I looked up the message in the help file, and saw that it is supposed to tell me which function crashed. The problem is that I have no function called "Event" nor do I use events in my game.

I can get past the error message by clicking "OK" several times, but then the level loads like normal after that and nothing seems out of place or non-functional apart from that error message.

How do I fix this, and why is it happening?