We want to use some of the Tomahawk extensions to MyFaces. We followed the instruction here to get the Tomahawk jar loaded with JBoss: http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossWithIntegratedMyFaces The problem is, since we are using Seam we are using Facelets not jsp's. So we followed the instructions here: http://wiki.apache.org/myfaces/Use_Facelets_with_Tomahawk creating a tomahawk.taglib.xml file and adding the parameter to web.xml <context-param> <param-name>facelets.LIBRARIES</param-name> <param-value>/WEB-INF/tomahawk.taglib.xml</param-value> </context-param> When we do this, our page with the tomahawk tag gets this error: Error Rendering View[/postworkshoplist.xhtml] java.lang.IllegalStateException: ExtensionsFilter not correctly configured. JSF mapping missing. JSF pages not covered. Please see: http://myfaces.apache.org/tomahawk/extensionsFilter.html So we went to that page and tried to add the filter to our web.xml and our application crashes on startup. I was thinking perhaps we need to add the configuration to JBoss not our app, since the MyFaces stuff is in JBoss but I couldnt find anything on the JBoss site except in some forums people say they do have this configured. Any help on the configuration would be appreciated. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4039432#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...