Hmm. That's right. But the reason why I use script expressions is to allow the developer to make little changes for the running system on the fly. Then, the modified processInstance is deployed on the production system without running any unit test. If the modifications in the script are now broken, a RuntimeException will occur. This is what I want to avoid... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3973523#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...