Such questions are often asked from beginners, but the answers are not helpful.

Since only experts can rule all these side effects, which are caused from such bad programming practice.

E.g. the stack was unbalanced in general, since an interrupt can be fired on every instruction of every other routines.

The more proven practice was always to set a bit variable which cause to terminate all interrupted subroutines down until the main and then call the desired funktion.


Peter