Still working on this. Tried disabling automatic sensor cleaning also replaced the camera battery with a brand new, fully charged one. Problem persists. Here is an EKOS log file from an attempt to capture 20 Bias frames at ISO 800.

Nice (in a way) to know it's a common problem; at least it's not me. I did look online for similar posts before posting mine, but didn't find any.. I'll try the manual sensor cleaning thing, but as for returning the camera for replacement, I bought it used off eBay, so good luck with that.

Thanks again for your help!

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Wow Jasem, thank you for the incredibly prompt response!

Th camera was set for auto power off after 30 minutes, but the failure occurred before that time had elapsed. Nevertheless I have disabled the auto power off and tried again. Sorry to say that didn't solve the problem.

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Controlling a Canon EOS 50D with Stellarmate OS running on a Raspberry Pi 4. Camera locks up during image sequence capture after a few images captured successfully (the exact number varies), and the sequence is aborted. Camera displays "Err 30 Shooting is not possible. Turn the power switch to <OFF> and <ON> again or re-install the battery." Power cycling as advised does clear the error. After restarting OKOS I am able to start a new sequence, only to have it abort again.

I have checked, camera battery is fully charged. The camera's mirror mechanism works fine in hand-held burst shooting mode, cycling rapidly for 50+ exposures without error.

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