i had the same problem and solved it by replacing the myfaces-api.jar and myfaces-impl.jar in jbossweb-tomcat55.sar/jsf-libs with the "same" jars from jbpm.war/WEB-INF/lib. The ones in jbpm.war need to be removed. but i don't understand why i should have done that. it is somehow a strange behavior of jboss-as or the integrated web container. anyone can throw some light on this issue? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4005382#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...