Re: [rules-users] java.lang.NullPointerException at org.drools.reteoo.ReteooFactHandleFactory.newFactHandle(ReteooFactHandleFactory.java:56)

Hi everyone! we have made other tow tests: 1 - As suggested by Vincent, we have just used the source gets from Guvnor and all work fine. In addition, it would seem that putting observations and events in the same package all work fine!!! 2 - We have tried to put the observation in the same packet of event in the model and the new drl becomes: from *package* org.dfms.model; to *package* org.dfms.model.situation; from* import* org.dfms.model.observation.ACObservation; to *import* org.dfms.model.situation.ACObservation; * * *import* org.dfms.model.situation.AccessControlEvent; *import* org.dfms.model.situation.SituationManager; *import* org.dfms.model.situation.Event; *import* org.dfms.model.mapfeature.AccessControlPoint; *import* com.vividsolutions.jts.geom.Point; *import* com.vividsolutions.jts.geom.Geometry; *import* java.util.HashSet; *import* java.util.ArrayList; *declare* ACObservation @role(event) *end* *declare* AccessControlEvent @role(event) *end* *rule* "AccessControl" *no-loop* *when* $obs : ACObservation( $sensorid : sensorId, $location : location ) over window:length(1) *from* entry-point access_control *then* *insert*( SituationManager.createAccessControlEvent( $obs, "Access Control Detection", Event.THREAT_NO, $location, $sensorid )); *end* then we have loaded the pkg from Guvnor (by this link http://localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/org.dfms.mo... ) into our application and all work fine!!! Thank you and best regards. Carolina 2012/7/24 Vincent LEGENDRE <vincent.legendre(a)eurodecision.com&gt;