I am working on some Vb.net software for a second scope and part of that is to do focus. I had similar SW I did maybe 10 years ago under Vb6 and used MaxIm and Focus Max simulator to determine if my focus code worked. This time around MaxIm simulator works but FM sim seems totally broken. There is no Vcurve present, no slopes, no PID, then it tries to tell me that it has exceeded maximum position for the focuser. It is a total mess. One would think that it would work even when the real sky did not as it can be tested by the developers on the bench.

Anyone have any ideas? I REALLY don't want to waste precious sky time on development work.