Just opened table tblUser_rechner and see a lot of "empty" User_ID which is confusing.
That can happen when there is a pc without a user assigned. In reality the pc would then be stored in our office untill we decide what to do. If there is no user there has to be something entered for "Verwendung" (I handled this with vba in my main Project, in the example i uploaded it's not relevant)
They contained personal information so i deleted them before uploading the example.Where are records 8, 9 10?
Again, this was related to my main project. The form in the example database I uploaded is a subform in my main project that is filtered if loaded. Should not be relevant to the current problem though.Main and subform??
I attached the current version of the example database.