Hi, I got similar error somehow, with (AFAIK) 12CE519. It does not harm (yet), but is annoying... Regards, Imre On Wed, 22 Sep 1999, Douglas Burkett wrote: > I've just started working with the 12c509, and when I program the chip. I get an error stating the configuration is not programming properly. Although a rea d of the chip proves otherwise. It isn't a show stopper, just annoying to have the error every time. Is something set improperly? Or is this common? > > Thanks, > Doug > >