"PeterJ" wrote : How is your application packaged? Where is the fop_95.jar file located within that package? It's a WAR web-application within a EAR folder. It's a "embedded" JBoss Server within the Enterprise Content Management System EMC Documentum. Now i moved the fop_95.jar to the WEB-INF/lib folder of the web-application. Now it works. But now i recieve the error message: java.lang.VerifyError: javax/mail/Part.setDataHandler(Ljavax/activation/DataHandler;)V Can i trace the classloading in JBoss? Thanks for your help. Greets Oliver View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225438#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...