Hello Fred,
I have the same problem with FMS 20.3.1 and Windows Server 2022. The server closed the files a few times since I have installed this version a couple weeks ago. I have reinstalled FMS 20.3.1 from a fresh installation (without updating the previous version) and it did not noticed any change, the problem happened again. I have submitted the problem to Claris and it seemed that it was not observed before; they were not very helpful. I did not observed this problem with FMS 20.1.1. I finally have decided to reinstall FM 19.6.3 and it seems stable for now.
