Hi, My conf : Windows XP JDK 1.5.0_14 JBoss AS 5.0.0 GA I get this "java.lang.UnsupportedOperationException: setProperty must be overridden by all subclasses of SOAPMessage" with my junit tests runned from ant. I checked that : - JBoss is the jdk5-compiled version - I compile Junit tests with the JDK5 and I launched Junit with all the JBoss libraries in the classpath : lib/endorsed, common and client. - To be sure, I removed all occurence of JDK and JRE 6.0 from my computer. If you have any clue... Thanks for your help. Eric View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4209892#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...