Hi Peter, Thank you for the reply. I am using version 4.2.3 and I have successfully added the error-page tag in web.xml in server/all/deploy/jboss-web.deployer/ROOT.war/WEB-INF/ When I go to http://host:8080/blablah, I see the customized 404 page. However, when I go to http://host:8080/app1/blablah or http://host:8080/app2/blablah, etc, I get the standard JBoss error. I think I am almost there, and missing an obvious step, but easy step ... any ideas? KM View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4258478#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...