Thank you for answer, but I spent an hour trying to do it and didn't succeed. I added into my components.xml next line: <component name="org.jboss.seam.web.exceptionFilter" installed="false"/> It didn't work: ... | INFO 02-08 10:14:04,718 [org.jboss.seam.Component.<init>():239] Component: org.jboss.seam.web.exceptionFilter, scope: APPLICATION, type: JAVA_BEAN, class: org.jboss.seam.web.ExceptionFilter | ... | INFO 02-08 10:14:06,875 [org.jboss.seam.servlet.SeamFilter.init():95] Initializing filter: org.jboss.seam.web.exceptionFilter | ... | ERROR 02-08 10:14:08,656 [org.jboss.seam.web.ExceptionFilter.doFilter():68] handling uncaught exception | ... I tried different combinations: with defining class and without, with setting precedence level and so on. It didn't work. I checked all examples from CVS - none has install="false" property for any built-in component. So, are you sure, that I can switch off built-in component like filter? If yes, can't you post an example or link, how to do it? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4069973#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...