Ok… I reinstalled the AxiDraw extension on top of everything and I no longer get the error. While I didn’t have a pen installed, it seems like the “air run” went to the expected locations. With the default settings, it looked like there was a lot of mechanical “jerking” of the entire unit…. it seemed to settle down if I applied light pressure to the top of the stepper (in order to hold things down against the work surface). I’ll be able to test tomorrow with an actual pen and see how all of this affects the results (or not).
Thanks for the quick response.