Hi Wlfgang and all... I will try to get the code posted soon. In the meantime... I have narrowed things down. What do you make of this? Class1 actually has two getters as above. Set<OwnedItem1> getOwned1(); Set<OwnedItem2> getOwned2(); Each has has its own jointable and all are connected by the Integer Primary Keys of their respective tables Class1 - jointable1toOwned1 - Owned1 Class1 - jointable1toOwned2 - Owned2 It turns out that getOwned2 returns a Set with a maximum set.size of the number of items in getOwned1. Amost like an inner join where an outter join is required. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4027788#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...