I found that the reason I can't run the jsr181pojo ws example is the following: java.io.InvalidClassException: javax.xml.namespace.QName; local class incompatible: stream classdesc serialVersionUID =, local class serialVersionUID = -9120448754896609940 as stated at http://www.jboss.com/index.html?module=bb&op=viewtopic&t=89773&am... I'm running JBoss [Zion] 4.0.5.GA + Java version: 1.5.0_09 I tried copying namespace.jar to the thirdparty dir and adding it to the build-thirdparty.xml, among many other ways. Nothing helped. does anybody knows a way to solve this for jsr181pojo ws example? Thanks in advance --bentzy View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4008356#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...