Are you using any other JARs in your project that reference Seam in any way? Or are there any JARs that contain any other custom listeners or faces-config.xml files? Can you deploy the existing examples to tomcat with "ant deploy.tomcat" and run them? Jason DeTiberus has actually just beaten me to a working test integration of GWT and Seam, and he had issues with error messages about duplicate Seam phase listeners, even though what he had was a GwtPhaseListener (from the g4jsf-cdk) and a SeamPhaseListener. So it's possible that multiple listeners can (in some permutations) confuse the Seam listener into double invocations. Or something. I should get to try his code this weekend and will try to produce a more detailed analysis then. Cheers, Rob View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4026023#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...