It doesn't matter if it's in the iCloudDrive or "on my iPad" eg DataFolder. The file itself is read and write enabled. I can't open it when trying on the "real device" but it works with the Simulator. Is there something I have to do with the "entitlements" of the target?

Thanks a lot! Now it works!!!

My first question is, how can it be, that the code that was working well is not accepted any more after the latest update? I'm quite angry, because i wanted to publish the App on the AppStore because it was already running in TestFlight. Or ist there may be a problem in the new version of xCode before I try to figure out a problem that didn't exist before ...

Hi Eskimo! Thanks for your answer. Indeed my code has many if-closures within different views using Strings, Doubles, Floats and Ints. But as it worked so far, I didn't see any reason to simplify the code or split it like you described. It would be a lot of work now to change all this in the concerned lines of the code and I'm not very experienced in creating separate "funcs" for all those if-conditions. Could it be helpful for me to ask for some "Code level support" in this case?

Thanks a lot, going back to 15.2 solved my problem. Everything is running fine again without changing a lot of code! Great!

Thank you, this will help me simplify code structures for my next code lines!