Hm, unfortunately the log doesn't quite tell me enough to pinpoint the issue, it seems to be sending dome steps per revolution calibration value to the client, but I can't think of a reason why the ISState would be invalid in that case. Enabling driver debug logging from Ekos might show a bit more, but I fear it would need a bit more debug prints or running under debugger to find the issue. Have you compiled the driver (and INDI) yourself or are you using PPA package?

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