Hi Charlie,

I had thought about the "OR" gate option but I am not sure if the intermittent fault would last long enough to read the state of all the pins after the interrupt was triggered.
The PIC16(L)F1526/7 still only has PORTB IOC as an option so all those other pins don't really help my cause.

Thanks for taking the time to research other option though - greatly appreciated.

Cheers
Barry
VK2XBP