Hi all, Problem solved. Basically if I set ANT_OPTS=-Djava.endorsed.dirs=...\jboss-4.0.4.GA\lib\endorsed -Dcom.sun.xml.namespace.QName.useCompatibleSerialVersionUID=1.0 then the Hello World example works fine. I also found the serialVersionUID resolution on this forum. I now have the following setup: | - jdk1.5.0_11 (definitely the only version installed) | - jboss-4.0.4.GA | - jbpm-bpel-1.1.beta3 | | | Doubtless I will add jwsdp-2.0 again at some point soon. | | Now all I need to do is write my own process?! | | Thanks for the help. | | Phil View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4016317#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...