I had the following in a SFSB that worked until I upgraded to Seam 1.2.1. | @Out(scope = ScopeType.CONVERSATION, required = false) | @DataModel(value="dosRecordPend", scope=ScopeType.UNSPECIFIED) | private List<Map> dosRecordPend; | This was obviously an error on my part, but caused an runtime exception. java.lang.ClassCastException: java.util.ArrayList cannot be cast to javax.faces.model.DataModel Is there any reason to use @Out and @Datamodel in combination? If not, should this not throw and deployment error such as when you do not use scope=ScopeType.UNSPECIFIED or scope=ScopeType.Page with @Datamodel? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4036598#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...