I agree. it is not due to number of targets as I will see this with only 6 targets in the sequence. I can be certain I will have this problem 2-3 times in the night so surprised not many others have mentioned this. It will be cloudy this week, so will do some research on collecting logs and run in debug mode and try to isolate the issue. part of my problem is the dialog error is clearly not the real problem but rather a symptom of something else. some of the ideas I have had are related to SD card read fails, or there is a background loop that is reviewing the targets and updating info like date/time for processing and angle in sky and it must fail the read in the process and that results in fail.

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