Those *Home.java, *List.java *.page.xml , etc. were generated under seam 1.1.7 and are running under 1.2.0. I did not re-run seam to generate the projects, since I did a lot of modifications to the genrated pages. It is obvious that the code generated using 1.2 seam-gen are different from that using 1.1.7. I'd like to know what could cause this exception and any simple solutions to fix that. thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4025885#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...