Thank you for your prompt reply. I then started looking at my Ascom Diagnostic again and discovered that if I ran it without running the Pegasus software first, it gave the same good response as your pic! I then tried Nina without running the Pegasus app and Voila! everything worked. So it turned ou...

I am getting exactly the same error, with the same DMFC, and Win 10 v20H2. It is happening on 4 different PC's . I can connect and run the focuser standalone, but when I try to connect to the ASCOM diagnostic, as NINA gives dot net error message and will not connect, I get an "access to port co...