Thanks for your answer Swatis. I am traveling around and don't have access to jBPM code for now on. My issue is: First by implementing the AssignmentHandlerInterface and using: assignable.setPooledActors(new String[] { groupNameId }); I assign a taskinstance to a group of people. When a userA wants to "end" the taskInstance, the code is: taskInstance.setActorId("userA"); taskInstance.end(); After when I run a simple query looking for taskInstances that are ended and have pooledActors equal to groupNamedId, I have no results; as if my taskInstance.getPooledActors was equal to null. Is it comprehensible? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4225371#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...