I got the same yesterday. I suspect the error message includes Rev-Ed diagnostic code; in my experience it means the program has become too big to fit in memory.
It's not necessarily because of SETINT. Comment out lines until the error goes away on a Syntax Check and check what the pop-up says about memory used.
When I make it smaller, but still too big, it tells me to reduce the size by say 51 bytes. So is there a point at which it gives up and the compiler simply terminates?