> It's also not easy to achievem because the PIC to be programmed is 
> connected through a 25 cm flatcable,
> and no capacitors are allowed at the end of the flatcable (because of 
> switching times).

Stef, I hope you do have decoupling cap(s) (at the very least one 100nF)
on the power pins directly at the target chip? I have heard of PICs
failing to program in mysterious ways without that cap.

Wouter van Ooijen

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Van Ooijen Technische Informatica: www.voti.nl
consultancy, development, PICmicro products
docent Hogeschool van Utrecht: www.voti.nl/hvu
 

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