Hi Esteban, sorry but I need your help again. I succeeded in re-writing all my code to use voyage and can save all my model now. Great! Now I was experimenting with it and I have an Image freeze which should not occur in production;-). Situation: I created one Person with two trips. Trip points back to its person. After writing it into mongo, I delete one trip from mongo manually (I use rockmongo, great tool). So in the database, I have now 1) one Person which points to two trips 2) one trip (the other was deleted) Now, I do: Person selectAll first trips and the image freezes. Sometimes, I find in the DebugLog: VOMongoError: Lazy reference not found RKATrip: OID(103475906) This is correct ;-) I did also try with enableMissingContent but did not work. http://forum.world.st/Voyage-GC-collecting-random-objects-td4668438.html Sure, normally, we do not manipulate the database manually. But I want to be sure that the image does not freeze if this occurs.... How can I solve this? regards Sabine ########################################### with this filein you can reproduce it easily ########################################### Object subclass: #Person instanceVariableNames: 'trips lastName' classVariableNames: '' poolDictionaries: '' category: 'RKA24-Demo'! !Person methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:02'! lastName ^ lastName! ! !Person methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:02'! lastName: anObject lastName := anObject! ! !Person methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:02'! trips ^ trips! ! !Person methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:02'! trips: anObject trips := anObject! ! "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "! Person class instanceVariableNames: ''! !Person class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/15/2013 10:06'! isVoyageRoot ^true! ! !Person class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/15/2013 11:48'! mongoContainer <mongoContainer> ^VOMongoContainer new collectionName: 'testPersons'; enableMissingContent; kind: Person; yourself! ! !Person class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/15/2013 10:13'! mongoTrips <mongoDescription> ^ VOMongoToManyDescription new attributeName: 'trips'; kind: Trip; yourself! ! Object subclass: #Trip instanceVariableNames: 'description person' classVariableNames: '' poolDictionaries: '' category: 'RKA24-Demo'! !Trip methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:04'! description ^ description! ! !Trip methodsFor: 'accessing' stamp: 'sabineknoefel 8/12/2013 10:12'! description: anObject description := anObject! ! !Trip methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:04'! person ^ person! ! !Trip methodsFor: 'accessing' stamp: 'sabineknoefel 8/15/2013 10:04'! person: anObject person := anObject! ! "-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- "! Trip class instanceVariableNames: ''! !Trip class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/12/2013 09:47'! isVoyageRoot ^true! ! !Trip class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/15/2013 11:48'! mongoContainer <mongoContainer> ^VOMongoContainer new collectionName: 'testTrips'; enableMissingContent; kind: Trip; yourself! ! !Trip class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/15/2013 10:12'! mongoPerson "VOMongoRepository allInstancesDo: #reset. " <mongoDescription> ^ VOMongoToOneDescription new attributeName: 'person'; kind: Person; yourself ! ! !Trip class methodsFor: 'as yet unclassified' stamp: 'sabineknoefel 8/15/2013 11:50'! testOnePersonTwoTrips | theTrip the2ndTrip thePerson | thePerson := Person new lastName: 'Knoefel'. theTrip := Trip new description: 'Trip to Munic'. the2ndTrip := Trip new description: 'Trip to Essen'. theTrip person: thePerson. the2ndTrip person: thePerson. thePerson trips: (OrderedCollection with: theTrip with: the2ndTrip ). theTrip save. VOMongoRepository allInstancesDo: #reset. "now I delete one trip from mongo" Person selectAll first trips! ! -- View this message in context: http://forum.world.st/Voyage-image-freeze-VOMongoError-Lazy-reference-not-fo... Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.