I have a service that uses JMS and I have tested it stand alone and it works fine. However, when I wrapped it in the StandardMBean interface and deploy it, it loads and begins to execute. Then I get an exception when it calls ConnectionFactory.createConnection(). Part of the stack: java.io.IOException: Can not read data for version 4. Supported versions: 1,2 at org.jboss.remoting.transport.socket.ServerThread.versionedRead(ServerThread.java:387) at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:439) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:520) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:257) 13:14:11,559 ERROR [SocketClientInvoker] Got marshalling exception, exiting java.io.EOFException at java.io.DataInputStream.readByte(Unknown Source) at org.jboss.serial.io.JBossObjectInputStream.readByte(JBossObjectInputStream.java:227) at org.jboss.jms.server.remoting.JMSWireFormat.read(JMSWireFormat.java:411) at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:279) at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:143) also: 13:14:11,606 ERROR [JBossConnectionFactory] Failed to config client side AOP java.rmi.MarshalException: Failed to communicate. Problem during marshalling/unmarshalling; nested exception is: java.io.EOFException at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:306) at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:143) at org.jboss.remoting.Client.invoke(Client.java:525) at org.jboss.remoting.Client.invoke(Client.java:488) Any ideas anyone? I don't even know what this means. I am using JBoss Messaging 1.01 CR4. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3968720#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...