Hi Neil, He mentioned already, it's room temp - he tries to program it couple of times, then suddenly it succeeds and then it works fine from that point until he leaves it for more than two hours. What I was wondering if that is really the PIC or the programmer if that supplies the correct Vpp and Vdd or if that is from an external power source if that source is the faulty. Also if that PIC can be programmed by a different programmer when it's 'cold'? BTW a freezer spray would be worth to try I think so that the PIC could be cooled down separately of other parts to see if the PIC itself is the weak point here. Tamas On 10/6/07, PicDude wrote: > > Hmmm... that's interesting. I am working with 16F877's and 16F877A's right > now > and I'm very curious. If you tell me what temp you're considering cold, > I'd > be interested to experiment with my setup here. > > Cheers, > -Neil. > > > > On Friday 05 October 2007 13:45, Rob Blanchard wrote: > > Is this an indication of a bad part? > > It will then successfully program on the 6th or 7th pass and verify > > ok. > > > > It's in a midi project that will sometimes work correctly, other times > > will miss midi messages. > > > > Thanks, > > > > Rob > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist