I downloaded jbossws-native-2.0.3.GA. Using wsconsume ("contract-first") on the command line works fine but as an ant task (in eclipse) I get this error: NoClassDefFoundError: com/sun/xml/stream/buffer/XMLStreamBuffer. JDK is 1.5.0_06. I reference following jar files in my ant task (path id): jbossws-spi.jar jboss-xml-binding.jar wstx.jar activation.jar javassist.jar getopt.jar jaxb-api.jar stax-api.jar jaxb-impl.jar jaxb-xjc.jar jaxws-rt.jar jaxws-tools.jar jbossall-client.jar jboss-saaj.jar jboss-jaxrpc.jar jboss-jaxws.jar jbossws-client.jar log4j.jar mail.jar I read something about the bug http://jira.jboss.com/jira/browse/JBWS-1711 in JIRA and it should be resolved. Any hint, what is wrong in my ant task? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4127017#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...