Hi, I'm trying to develop a simple client for EJB3's MDB, but somehow it will always raise exception in "(ConnectionFactory)ic.lookup("/ConnectionFactory")" statement (it's exactly the same with the sample in Jboss Messaging bundle) InitialContext ic = new InitialContext(); ConnectionFactory cf = (ConnectionFactory)ic.lookup("/ConnectionFactory"); Queue queue = (Queue)ic.lookup("/queue/testQueue"); The exception : Exception in thread "main" java.lang.VerifyError: (class: org/jboss/jms/client/delegate/ClientConnectionFactoryDelegate, method: getClientAOPStack signature: ()[B) Incompatible object argument for function call I'm using JBoss AS 4.2, Eclipse 3.2.2, JBoss IDE2.0, and JBoss Messaging 1.3 GA. I can run the sample ejb3mdb from Jboss Messaging bundle with no problem. Does anyone know what is happening ? Thank you. Regards, Ferry View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4052005#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...