Hi Daniel, i think that jboss or seam may internally supports jasper libraries ,due to which i m getting the exception.so plz me the way i follow to use jasper reports in seam as I didnt get clear with u r code and u way of approach. EVen i tried it using this way JasperRunManager.runReportToPdfStream(input,facesCtx.getResponseStream(),parameters,conn); View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4047881#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...