Gentlemen

Thank you for your thought and suggestions.

Jazzcnc
I'm not convinced it's a PP driver problem as the machine PC has the PP driver installed, not sure if the laptop tried to install a driver, besides neither computer is connected in any way.

m_c
I checked to see if the index emulating box was ticked on both computers, neither were and ticking the box has no effect.

My gut feeling after a good nights sleep is:- G76 is inhibited in the demo mode so I'm wondering if the machine PC has inhibited G76, even though it appears to have read and accepted the licence file.

Guess I'll have to load the program and licence file on another PC to test my theory.

GeoffV