I am using AS 4.2.3 (jdk6) without modifications to the hibernate files. In order to continue working I simply switched to annotations for the time being (but would like to switch back) but I can pretty much quote from memory: Deploy jar file (once for each jar) object mapping file found in META-INF/orm.xml Binding object my.test.class (this file always remains the same) I had already confirmed that each jar contains the correct orm.xml file. I had also thought about renaming the orm.xml for each project and mapping it in the persistence.xml. I'll revert my changes and get you a log output. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4210583#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...