Hi Al,
I wouldn't call an IF/ENDIF construct a loop but anyway, I certainly wouldn't worry about it. I mean, what reason could there possibly be preventing it from working? I do admire your desire to test and verify though, nice job!

Again, if that IF/ENDIF construct was within a subroutine to which you jumped with a GOSUB, THEN a GOTO someplace could (will)mess it up if it doesn't eventually end up at a "matching" RETURN.

/Henrik.