Hi there, I don't know if I can answer your question exactly, but I can assure you that I've been using DB2 for about two years now, with hand-written JDBC code to do my inserts into tables with AUTO-INCREMENT, and I get DuplicateKeyExceptions all the frickin time. I've actually had to hand-write exception handlers to catch any exceptions during inserts, check the cause, and if it's because of a duplicate key exception, perform a manual increment and re-insert the row. I'm using DB2 v 8. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4031771#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...