Robert A. LaBudde wrote: > > I wrote the following sample ("sqwave.sti"): > > !12.28.99 23.15 SQWAVE.STI > !stimulus file for SQWAVE.ASM > CYCLE GPIO1 GPIO2 GPIO3 > 1 1 0 0 > I don't have MPLAB or the documentation to hand so I could be wrong, but I believe the first line of a stim file MUST always begin with CYCLE... etc. If you put remarks or anything else there then the whole file is ignored! I vaguely remember this catching me out as a Microchip newbe a few months ago since I always fully document everything fully and it came as a surprise that you cannot use a header in a stim file. Dave B