Hi, I'm running the StateExampleUsingSalience example. It uses a fact with PropertyChangeSupport. AFAIUI I don't have to call update() every time I modify this fact in the RHS, when I want to have my rules to be reconsidered. I've modified the drl to look like this: rule "a" no-loop true when b : State(name == "B", state == State.NOTRUN ) then System.out.println(b.getName() + " finished" ); b.setState( State.FINISHED ); System.out.println(b.getName() + " finished 2" ); b.setState( State.NOTRUN ); end When I insert a State object (name="B", state="State.NONE"), this rule would run forever if no-loop wouldn't be set to true. Unfortunately I'm wrong. If I want to have no-loop working I need to provide update() after b.setState(). So it looks like PropertyChangeSupport doesn't cancel an activation, like update() does. Thanks, Jarek