Hi lafr, first of all thanks for posting this. Is the exception stacktrace you posted here complete? It's not clear to me when that serialization actually happen. Knowing a bit more about the ws client might help understanding your specific issue. Also knowing what else you changed in the sources to solve the serialization issue would help. thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4233895#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...