Hi All, My sincere thanks to Wolfc. He correctly pointed out the error. In my code TabFactory contain some other objects which are not serializable. When i made them serializable, it is working fine. If anybody faces similar error then plz check you objects returning from remote interface are serializable(including objects that object). Regards, View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4079081#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...