That did it! Thanks so much! Now it makes sense. If I remember correctly InnoDb storage type allows you to carry out executions in 'safe' transactions and enforces foreign key constraints, etc to maintain db integrity. Quite possibly the other dialect I was using did not enforce such rules so it was rejected. My db is definitely using InnoDb storage. This is probably true for most people using MySQL since it's the default type when installing MySQL server. Anyways, that was just additional info. Thanks again! View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4238638#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...