Yes thanks Bruce. Slip of the tongue between Editor & Programmer. It was the Programmer I set back to default options. I guess I must have jiggered one of the default settings which as you say stopped it loading and using the embedded settings.

Thanks for explanation of clock settings on the 16F684. I have looked up the datasheet and see exactly what you mean.

It's a long and slippery road but a great learning curve..........

Regards

Adrian