[rules-users] Drools Fusion: updating event duration

Hi all, i am using Drools Fusion in multi sensor data fusion system. I have some rules that generate a new event when some situations occur. But from the other hand, i would like to update the event, when i understand that new sensor observation is referring to the same event. I have my Event clazz with duration field, i try to update it in modify clause, but i have concern about it, because when i use temporal operator (such as before, meets, so on) it seems that Drools manage them as event with duration null. I could post the code too. Bye bye, Matteo.