I have the same problem. I am using CallByValue=false and Isolated=true. I have added correctly the ejb-ref into the jboss.xml and ejb-jar.xml, and in my company we are using Jboss As 4.2 cp07. I can succesfully lookup the EJB, but I get this exception: | Invalid invocation, check your deployment packaging, method=public abstract | when I do the create. Can you help me? Thanks. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4254366#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...