I have several subroutines within subroutines in my code, all of which DO have RET at the end. The program runs according to expectations until the very end of the program - it does not terminate but calls one of the subroutines again and appears to repeat the whole code again.
Are there any typical/obvious reasons for this behaviour? (I DO have END at the end!)

Thanks,
Siobhan W.
(Student)