We have some claims that certain PIC parts have been turning up with bad programming. As in, "It failed during burn in, so we reflashed it, and now it's fine". This is the sum total of the research, so if you're thinking "hearsay" or "rumor", you may be close. I have requested that any of these defective parts be sent to me so I can at least determine if we're talking bits, bytes, blocks, or the whole program segment. What I want to know is, has anyone ever seen such a thing in the PIC line? Does Microchip have anything to say about this? I don't recall seeing discussions of this nature, and that has me guessing that this isn't a real problem. I have seen similar discussions regarding EEPROM's, but I think this is a little different. I have had other issues with programming, but it never came down to the part "forgetting". FYI, favorite chips are 18F877A and 18F6621. Promate III programmer, supposedly better than my ICD2. Never had anything forget after using the ICD2. Barry -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist