Some more details about the installation. [Server] Release ID: JBoss [Trinity] 4.2.2.GA (build: SVNTag=JBoss_4_2_2_GA date=200710221139) installed on a linux box 2.6.18-53.el5 #1 SMP Wed Oct 10 16:34:19 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux Please note that the same Jboss4.2.2+JbossWS 2.0.3 installed on a Win Vista Business SP1 works OK and does not throw any exception. I thought there might be different JbossWS packages for win and linux but the web site has just the same .zip for download View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4230010#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...