Hi,
I read the source of the Jbpm example application.
in the File processdefinition.xml we find:

<swimlane name="salesman">
 <assignment expression="user(ernie)" />
 </swimlane>

This part of code atribute the user ernie to a swimlane (role ) salesman.
My problem:
if in my application we have the possibilitie to add new user with a existing role .
we must update the file processdefinition.xml !!!!!?? how to do it?