Hi, We are in the process of upgrading our existing application to JBoss SOA 4.2. After the migration when we test our JMS features, we are getting some issues. When we try to deploy our MDB, we see the below exception. [java] javax.naming.CommunicationException [Root exception is java.rmi.UnmarshalException: error unmarshalling return; nested exception is: [java] java.lang.ClassNotFoundException: org.jboss.mq.referenceable.ObjectRefAddr (no secur ity manager: RMI class loader disabled)] This MDB is recieving messages from a Queue which is deployed in Jboss 4.0.4 server (not SOA platform). ObjectRefAddr class is part of jbossmq_client.jar and jbossmq.jar. We can solve this by adding jbossmq.jar to our classpath but we dont want to do it because we are planning to go ahead with new jboss messaging feature and not to use MQ How do we fix this issue? We checked for all MQ references and could not find anything. Should we upgrade our Queue server also to SOA to fix this? Any help is highly appreciated Thanks in advance View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4160644#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...