Hi Michael, I would presume it would be as simple as uncommenting these two sections in your application.xml <!-- | <module> | <java>el-ri.jar</java> | </module> | | <module> | <java>el-api.jar</java> | </module> | --> They are commented out in your 4.2.0 examples, but not in your 4.0.5 ones. (I was looking at the CRUD example app from http://www.michaelyuan.com/download/seam/seambook-src-20070522.zip ) When I commented them out, my app started working on 4.2.0. :-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4048077#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...