Suddenly, I got a mysterious breakpoint in my code (didn't put it there.) I went ahead and stepped into the next line and my code suddently died. Some error about "receiving ARTH something or crap like that". Anyway. After a while, I found out that if I take out any code related to math, such as % and dividing it runs. With % and / in there, I get a "executable path is nil". WTF?!