"chawax" wrote : The seamdiscs example bundled with Seam sources is said to demonstrate Seam + Richfaces + Ajax4JSF = Trinidad. Did you have a look on it ? Maybe you will see configuration problems ? ;) Yes, we copied the same configuration but the exception trace still appears. By the way, the page works perfectlly, but the trace on the log can be a bit confusing. Regards Sebastian View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4094217#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...