Hi, I have some EJB3 MDBs which were working fine with JBoss 4.0.4.GA, JBoss Messaging1.0.1.CR5 and EJB3 RC8. The only issue was that I could not start/stop the MDBs using JMX. Reading through the forums it looked like this was fixed in RC9 build of EJB3. I installed the EJB3 RC9 using the ant script and followed the migration (RC8 - RC9) notes. On restarting initially got the error saying the jms-ra.rar was already registered. To fix that, copied the deploy/jms/jms-ra.rar to deploy/jms-ra.rar replacing the existing jms-ra.rar and deleted the jms directory. That got rid of that problem but I keep getting the following: MIPServer.jar,name=TestMDB,service=EJB3 java.lang.NullPointerException at org.jboss.ejb3.mdb.MDB.getMessagingType(MDB.java:85) at org.jboss.ejb3.mdb.inflow.JBossMessageEndpointFactory.resolveMessageL istener(JBossMessageEndpointFactory.java:241) at org.jboss.ejb3.mdb.inflow.JBossMessageEndpointFactory.start(JBossMess ageEndpointFactory.java:184) at org.jboss.ejb3.mdb.MessagingContainer.startProxies(MessagingContainer .java:185) at org.jboss.ejb3.mdb.MessagingContainer.start(MessagingContainer.java:1 51) at org.jboss.ejb3.mdb.MDB.start(MDB.java:126) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. I am sure I am missing some step here but cannot find what exactly it is. MDB looks like the following @MessageDriven(activationConfig = { @ActivationConfigProperty(propertyName="destinationType", propertyValue="javax.jms.Topic"), @ActivationConfigProperty(propertyName="destination", propertyValue="topic/topicname"), @ActivationConfigProperty(propertyName="durability",propertyValue="Durable"), @ActivationConfigProperty(propertyName="clientId",propertyValue="ClientID"), @ActivationConfigProperty(propertyName="noLocal",propertyValue="true"), @ActivationConfigProperty(propertyName="subscriptionName",propertyValue="SubName") }) Thanks for the help. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982962#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...