How about changing your code to: | InitialContext ctx = new InitialContext(); | NamingEnumeration<Binding> list = ctx.listBindings("persistence-units"); | while (list.hasMore()) { | Binding nc = (Binding)list.next(); | System.out.println("Persistence Unit EMF is relative : " + nc.isRelative() + " name: " + nc.getName()+" [class: "+nc.getClassName()+"]"); | | Object o = ctx.lookup("persistence-units/" + nc.getName()); | | if(!(o instanceof EntityManagerFactory)) { | System.out.println("No good; o instance of "+o.getClass().getName()); | } | else { | System.out.println("Got it again!"); | } | } View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173860#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...