Hi Bob,

I understand that there is not much you can do. I asked "Anything else I could try?".

The source code of RCOS TCC application is available, but it is not tempting to dive in trying to fix it.

If the RCOS TCC is still working and talking to the hardware it must be the ASCOM interface that is not working well. Do you agree? Any pointers making it more robust. How about one more layer of software between RCOS TCC and FocusMax. Is there any trick to avoid the "suspend" state?

Unfortunatelly there is not much that can be replaced on the hardware. The telescope is the "centerpiece" of the observatory and the focuser is "build in".

I am already thinking going back to the virtual WinXP and the 10 year old software stack.