I have a question over here
In the meantime the problem solved itself more or less miraculously and I no longer can't track it down. Most likely (90%) I was just unable to correctly use the GUI of MS Flow to analyse the processed data. I think I did not understand how to look at the individual cycles of a loop to find the errors in question properly. So I probably missed that in one single case a date taken from another list might have been unintialised, which could explain the errors. But as it tends to happen, I don't have any proof that this was the root cause. Nevertheless the problem is gone now and I doubt it will rise it's head again, soon.
What to do with this question now?
- Add an answer on my own, which can only answer 90% of the question?
- Delete the question?
- Accept the first answer which held one interesting link?
- Radically editing my question, i.e. marking everything which had nothing to do with the root cause as irrelevant and adding my ramblings about what I possibly did wrong?
What could be best for the community?