Oh, true. Sorry. I was only checking the | <context-param> | <param-name>org.jboss.seam.core.init.debug</param-name> | <param-value>true</param-value> | </context-param> | in the web.xml file. Thanks for your help. So just to clarify, in order to retrieve the exception message, all the exception that I throw must extend org.jboss.seam.handledException? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4032613#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...