I'm not sure if it's a restriction placed by JBM, but it seems that if have a dot in the client or subscription id, I get an IllegalArgumentException: Invalid message queue name: testDurableSub.x.y.x [I can see that identifying the sub id and client id from above pattern is not possible and hence the possible restriction] Any thoughts? /M View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4059544#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...