Al --

This is relating to FocusMax, so I have moved it to the FocusMax section.

FocusMax has a special "Simulator" system file
Snap1.png
(click for full size)

You cannot run simulated with My System, etc. selected as that requires real skies. I suggest that you just skip hassling with AutoFocus at home while simulating, and just use it on your real observatory. The wonderful people at New Mexico Skies will set up your FocusMax for you and run your V-Curves as well as the filter/focus offsets run. You can "just use it" :-)