Hi knro, thanks for your help.

I have updated and tested the wheel with my normal usb connection.
I used a minimal configuration to test: telescope simulator; ccd simulator and the sx wheel. This time the wheel connected in the driver control panel without crashing.
Unfortunately on selecting the sx wheel in the Ekos Capture tab kstars crashes. This seems repeatable. I attach a couple of backtraces that look identical plus the wheel logs.

Prior to this I tested using the ZWO ASI 178mm and the EQMod mount driver and results were less predictable. Sometimes I could get as far as Ekos capture, select the sx wheel and preview but the filters did not physically change (exactly as before) and the preview hung waiting for the filter to change. Also in these cases the filter drop down showed extra slots Filter_8 ,9,10,11 and 12.

Let me know if you would like me to try any particular tests.

Many thanks

Mark

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