Right...merely stating what I know: 1) This is a pre RC9 EJB3 release. 2) We do not support using Topics as DLQ destinations in JMS/JCA. Again, from what I can tell from the stack trace the JNDI lookup is failing when the MDB attempts to acquire it from JNDI. So, it's most likely a binding error. This stuff was removed from this class in EJB3 around RC8 when we reworked the implementation to use JCA and not the old JMS stuff. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3974086#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...