Hello Jan-Erik, [Wouter] >>I have some [18F1320], but I never experienced your problem! [Jan-Erik] > That's a bit scary, are we sure that *I* havn't done anything wrong ? I'm afraid I share Wouter's experience :-) Have you tried to program the 18F1320 also in 'minimal' setup like a simple 'blink-a-led' circuit? I don't think it is relevant, but you could also try: use of internal oscillator and disable LVP. Regards, Rob. -- Rob Hamerling, Vianen, NL phone +31-347-322822 homepage: http://www.robh.nl/ -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu