Just a wild guess: Is it possible that the download of the excel file is not going through the Faces servlet? Regards Felix View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4005301#4005301 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4005301