Hi, I have a PIC 16c55 that have been running a program for a year. Yesteday I needed to make a minor change in the program. After reprogramming with Picstart plus it dosn't work. Now I can't get _any_ '55 to work with _any_ program ! What can have happened ? Can the picstart plus fail to program just the 16c55 ? It still programs my 16c74 okey. /PJ