Hello everybody, first of all sorry for bothering the dev-list but I've been trying around for some time now and would like to know if this is possible or not. Actually I just want to do a very simple thing. I have process variables and I would like to use them as parameter values when performing java tasks. So I specify the argument of a java task like this: <arg><object expr="#{attendeeId}" /></arg> ! Supposing attendee is a process variable of type String. ! Caused by: java.lang.Exception: couldn't create argument 0: script evaluation er ror: javax.el.PropertyNotFoundException: Cannot find property attendeeId at org.jbpm.pvm.internal.wire.descriptor.ObjectDescriptor.getArgs(Object Descriptor.java:348) at org.jbpm.jpdl.internal.activity.JavaActivity.perform(JavaActivity.jav a:79) Is this possible? Ronald thought it was. How does JUEL know that attendeeId is of simple type and that there isn't a getter to be invoked like in the examples given in the documentation? For #{order.owner} JUEL would inkove order.getOwner() on the bean. Thanks for your help. Sebastian -- Mit freundlichen Grüßen / Best regards / Cordialement Sebastian Schneider, schneider(a)dvz.fh-aachen.de