can you try with Sun RI ? why do you need to replace with MyFaces ? "jgilbert" wrote : you can reproduce the error using the examples/portal from the seam 1.2.1.GA distribution. | | steps: | - install portal 2.6 on AS 4.2 | - replace the jsf libs with myfaces per the wiki | - build seam/examples/portal | - copy war and datasource to deploy dir | - start app server | | the exception from the original posting will be generated View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4060518#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...