Just a quick reply so that it may help future "non seam gen" coders: I also go bitten by : | 13:51:16,296 ERROR [STDERR] javax.faces.FacesException: com.sun.faces.lifecycle.LifecycleFactoryImpl | 13:51:16,296 ERROR [STDERR] at javax.faces.FactoryFinder.getImplGivenPreviousImpl(FactoryFinder.java:573) | .. | 13:51:16,671 ERROR [STDERR] Caused by: javax.faces.FacesException: org.jboss.seam.jsf.SeamApplicationFactory | 13:51:16,734 ERROR [STDERR] at javax.faces.FactoryFinder.getImplGivenPreviousImpl(FactoryFinder.java:573) | .. | 13:51:16,796 ERROR [STDERR] Caused by: java.lang.InstantiationException: org.jboss.seam.jsf.SeamApplicationFactory | 13:51:16,796 ERROR [STDERR] at java.lang.Class.newInstance0(Class.java:335) | And for me it worked to remove the id attribute in the web module (That was put there by some coding plugin from eclipse I presume). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4021600#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...