[rules-users] modify object Tree?

I have a fact which holds a reference to another fact. I wonder which one do I have to modify in my RHS. My Objects are Room and Thermometer. Room holds reference to Thermometer (and that has a property describing the value). When my rule fires I want to decrease the temperature level to simulate that the room gets colder until a certain value A is reached. So the rule should be called several times until the actual level equals A. This works ONE time when I set the new value on Thermometer and modify Thermometer, not reaching A (the rule isnt fired again). But works as expected when I modify Room instead of Thermometer (rules is fired several times). I'm new to drools and wonder if that is desired or if I do something wrong. To make things more confusing: When several rules met the same conditions, does only one rule gets fired or do all get fired (as I read it from Figure 1.19 of the documention). If I modify Room my other rules _dont_ get fired. When I had modified Thermometer my other rules _do_ get fired. Is there anyone who can shed a little light on that for me? -- View this message in context: http://www.nabble.com/modify-object-Tree--tf3268137.html#a9085281 Sent from the drools - user mailing list archive at Nabble.com.