We are working in a new implementation of JMS, called JBoss Messaging. JBoss Messaging is a complete rewrite as we are focusing on performance by changing some fundamental things like adding paging support and other things. By looking at your Queue, you are using the legacy implementation. If you are in fact using Messaging, you are mixing the definitions what would cause error If you are not, you are in the wrong forum. You should use the MQ User's forums View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3983817#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...