It is the day after Thanksgiving. This sound like a problem I am having with a PIC18F46K22. Certain subs that I call make the program go into outer space. I have even tried GOSUB to a subroutine that only contains a RETURN statement and it never returns. ONLY subs after what seems to be a sizable program exhibit this problem and it is every one of them.. Will check variables on the boundary on Monday.