>>>In my cleanup method I call CLOSE ALL. When I do that I get an Update Conflict error. How do I find out which table is causeing this problem so I can fix it?
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>>Are you using a view? If yes, make sure you don't have any primary key conflict.
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>Yes, I'm using a couple of views. How do I check for a Primary key conflict?

I would suggest to open the table manually and do a SQL group by to see if you have a key which has more than one occurence.