Darrel,

Thanks for the quick reply.

I made a cut & paste error in my last post.

It should have stated:
Pressing Button RB.6 [RETURN] Runs the DO_RETURN subroutine. It then sends program to DO_RBC_INT subroutine, then on to MENU. I would expect it to return to HOLD_HERE which is where the interrupt was originally activated.

Pressing Button RB.7 [CLEAR] Runs the DO_CLEAR subroutine Then the HOLD_HERE. At this point, the Interrupt handler seems to shut down as no Port B inputs activate the interrupt handler. I would expect this to just clear the interrupt then await another RBC trigger.

I agree that it should never get to the GOTO HOLD_HERE statement, at the end of DO_RETURN:, but should still end up in HOLD_HERE since that is where the program was was when the RBC_INT interrupt was initially activated.