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Christian,

In my application, similar things happen.
We have 2 fields for this action : Used-in-Flag and Used-By-User-ID fields.
Whenever, someone is accessing a particular record, these fields are populated
with 'Y' and userID and the record is updated rightaway.
Now when someone else tries to access the same record, the program reads the
values of these fileds and if they are 'Y' and 'UserID' then it issues a message
saying '..... is used by user(&1).....'.
And when you are done with the record you are accessing, clear these 2 fields
and issue an update.

It works for us.

Thanks,
Rajeev.



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