Commenting out the line in the persistence-dev.xml file removes the error and allows the generated project to work. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4098006#4098006 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4098006