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

Hello, first of all, I would like to thank you for suggestions. I tried loading drl from file and all work fine. The issue append when the application load from Guvnor5.3.0 the pkg. In particular the exception (I mentioned above) happens before calling the method "SituationManager.createAccessControlEvent": *public* *static* Event *createAccessControlEvent(*ACObservation obs, String description, *int* threat_level, Geometry location, *int* sensorid) { Event event = *new* AccessControlEvent(description, threat_level, (Geometry)location.clone(), sensorid, obs.getLoginfo(), obs.getErrno(), obs.getPersonelId()); event.addObservation(obs.getServiceIdentification()); *return* event; } I opened the source code at line 56 of org.drools.reteoo.ReteooFactHandleFactory (I'm using Drools 5.3.0 final): 45. *protected* *final* InternalFactHandle newFactHandle(*final* *int* id, 46. *final* Object object, 47. *final* *long* recency, 48. *final* ObjectTypeConf conf, 49. *final* InternalWorkingMemory workingMemory, 50. *final* WorkingMemoryEntryPoint wmEntryPoint) { 51. *if* ( conf != *null* && conf.isEvent() ) { 52. TypeDeclaration type = conf.getTypeDeclaration(); 53. *long* timestamp; 56. *if* ( type.getTimestampExtractor() != *null* ) { 57. *if* ( Date.*class*.isAssignableFrom( type.getTimestampExtractor().getExtractToClass() ) ) { 58. timestamp = ((Date) type.getTimestampExtractor().getValue( workingMemory, 59. object )).getTime(); 60. } *else* { it seems that "type" is null. Regards Carolina 2012/7/23 Wolfgang Laun <wolfgang.laun(a)gmail.com&gt;