Hi David, I
I believe you might be correct, we believe the problems in Access must be related to Windows 10.
We have a strange history of events:
The errors started on 17deazfezffez september 2020.
"Cannot close database because of lock by other user", "Cannot save due lock by other user", "Wait period for an event timed out", ... Or code errors related to locks on tables. Just like mentioned here before, the problem also seemed tI mo occur on tables that are related to eachother.
The errors were very infrequent and it took us weeks to determine that the errors where only caused by one laptop. The colleage had no different office version (365) and an up-to-date access front-end like other users. We found out that a system restore did help, but only temporarily. After a week, the error was back. Then we concluded it must have been caused by an automatic update.
After lots of experimenting, we decided to reinstall Windows 10, (incl. removal of files), it had NO effect, the same problem occured immediatly.
We became desperate and reinstalled the computer to Windows 10 with the option, redownload Windows 10 from the internet. To our own surprise, the error had been solved, it was 8 october 2020.
Suddenly on 15 october 2020, after a week without a single error. The problem reoccured, but now not by this user. The error seems to be caused by multiple users, maybe even all our windows 10 computers. We are already certain it happens because of multiple users. We are however uncertain whether the user with the completely reinstalled Windows still triggers the error. In theory we could reinstall every computer and redownload Windows 10.
To respond to @msdnPublicIdentity. "the FE design must avoid having the same table open in edit mode, at the same time". This seems almost impossible to achieve, too many queries open multiple tables.
Thanks everybody for their input. We keep searching. We are now installing the new Windows Version (20H2 19042.572) on the computers that we believe have already caused the error.
Steven