I think you were/are still a very smart person. I knew I read about that somewhere and that there was a reason I could call on you!

I didn't keep my promise to take a few days off :-(. I have done some new tests showing that shutterstatus can be in a error state (=4) before the telescope and dome are connected. Afterwards, never so except for legitimate errors.

This thread is tired out already - I'm going to start a new thread next week after I've done more trials.