Thank you. Maybe I do not fully understand the Race conditions problems, but I am the only user of the app, at this moment. So simultaneous access is not happening, and I am just reading, not writing anything
By the way, it sounds terrible if such problems can arise at any moment, isnīt it?
My app is still small, but following your advice, I am gonna strip it down to the smallest pieces. Each test must wait five minutes to see if it hangs or not. It is gonna be a long time, as I canīt figure where to look