(1) Ensure that the 'myint' in the ON INTERRUPT statement is the same spelling as the Label in the Interrupt Service Routine.

(2) Ensure that the myint label in the ISR has a COLON and not a SEMI-COLON following it.

(3) Ensure that the myint label in the ISR is against the left-hand margin of your source code, and is not prefixed by a Space or Tab or other character (this forum by default strips out formatting characters so we can't see if this is the case).

(4) Delete out both occurances of myint and retype them in.

See PM.TXT in your PBP directory.