Hi I need to use MyFaces with Seam 2.0 on JBoss 4.2.2 (one of third party jsf libraries needs it). Following the article http://wiki.jboss.org/wiki/Wiki.jsp?page=JBoss5AndMyFaces I have added a context parameter to web.xml. Which version of MyFaces should I use? If I use MyFaces 1.1.5 I get this error: 21:42:28,843 INFO [FacesConfigurator] Reading config jar:file:/C:/JBoss/server/default/tmp/deploy/tmp45116jboss-seam.jar!/META-INF/faces-config.xml | 21:42:28,843 ERROR [Digester] Parse Error at line 2 column 14: Document is invalid: no grammar found. | org.xml.sax.SAXParseException: Document is invalid: no grammar found. | at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source) | at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source) | ... And more and more ... If I use MyFaces 1.2.0 I get this error: 22:10:43,734 ERROR [DefaultFacesInitializer] Error initializing MyFaces: Class org.jboss.seam.jsf.SeamApplicationFactory is no javax.faces.application.ApplicationFactory | java.lang.IllegalArgumentException: Class org.jboss.seam.jsf.SeamApplicationFactory is no javax.faces.application.ApplicationFactory | at javax.faces.FactoryFinder.newFactoryInstance(FactoryFinder.java:128) | at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:107) | at org.apache.myfaces.config.FacesConfigurator.configureApplication(FacesConfigurator.java:499) | at org.apache.myfaces.config.FacesConfigurator.configure(FacesConfigurator.java:190) | at org.apache.myfaces.webapp.DefaultFacesInitializer.initFaces(DefaultFacesInitializer.java:112) | at org.apache.myfaces.webapp.StartupServletContextListener.contextInitialized(StartupServletContextListener.java:57) | at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3856) | ... What can I do? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4105235#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...