In fact, the problem in my opinion is in class org.jboss.seam.birt.ui.UIDocument. This class is provided by JBoss Tools and corresponds to JSF tags p:birt which allows a JSF application to call BIRT (thanks once more to JBoss devs much for those tags ! The only existing JSF tags for BIRT). This class is contained in jboss-seam-birt.jar which is generated when you use JBoss tools to create a Seam Web Project birt BIRT runtime facet. More documentation about those tags is available here : http://docs.jboss.org/tools/3.0.0.GA/en/jboss_birt_plugin_ref_guide/html/.... View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4256468#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...