OK. I want to add tracing to the MoveFocuser(). I am pretty sure that either PWI is telling me it is at focus position 0, or it is telling me that it is a relative focuser. Or if you're feeling brave I can show you where to add one line of code that should provide a possible smoking gun. I will call you later today and see if you'd be good with it. One quick test and we'll know. I know you want to get this going. Is that system at 8.2.1? If so I can send an already traced AcquireSupport for testing. It will be harmless to leave it for normal operation.