Now that I've read a tutorial called "SGP-The First Week" I realize that I didn't follow the correct procedure. The tutorial says that the first thing I should have done is to manually slew to a bright star, open Frame and Focus, taken a single exposure, press Start in F&F, center the star in F&F, and do a manual approximate focus. At that point I should run SGP's Autofocus. Only then should I have started PHD2 guiding, connected my mount and guide camera to PHD2, calibrated PHD2 and begun guiding. If I understand correctly all that has to be done before running a sequence in the Sequencer window. When I wrote my question to start this thread I hadn't already calibrated PHD2. So when the weather clears up I'll do the above procedures before I try to run a sequence and see if SGP reports any autoguider error messages.
Thanks,
Pete