Hi Darrel,

Thanks for your help.

I am using ver 1.00 and added the new Define per your instructions - same result (no Int's).

It compiles without errors (as before) and runs correctly in all other respects apart from an Interrupt taking place no matter how many times I trigger (or even hold the pin low).

I'm not desperate for the fix so if it's not convenient for you I can wait, no problem.

Kind regards,
Bill