Salut, j ai le message d erreur ci-dessous dans ma regle de gestion. alors le premier soucis j ai pas d idee : can't convert object in matrix Proportion from String: 'org.nuiton.topia.persistence.TopiaEntity(fr.ifremer.isisfish.entities.Metier#1218467347207#0.08063565015493301)' vous savez ce que c est ??? pour le second est ce que je manipule mal les "collections" ? failed to lazily initialize a collection of role: fr.ifremer.isisfish.entities.SpeciesImpl.population, no session or session was closed Collection <Population> pops = sp.getSpecies().getPopulation(); MERCI d avance WARN|22:28:53,812|MatrixType.java|227|splitObjects|Continuing but can't convert object in matrix Proportion from String: 'org.nuiton.topia.persistence.TopiaEntity(fr.ifremer.isisfish.entities.Metier#1218467347207#0.08063565015493301)' ERROR|22:28:53,906|LazyInitializationException.java|42|<init>|failed to lazily initialize a collection of role: fr.ifremer.isisfish.entities.SpeciesImpl.population, no session or session was closed org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: fr.ifremer.isisfish.entities.SpeciesImpl.population, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) at org.hibernate.collection.PersistentBag.iterator(PersistentBag.java:272) at rules.MPARuleBRUM_conditionnel_MultiSp.aw$original$_AW_$preAction$_AW_$rules_MPARuleBRUM_conditionnel_MultiSp(MPARuleBRUM_conditionnel_MultiSp.java:502) at rules.MPARuleBRUM_conditionnel_MultiSp_1__1556553279__240354642___AW_JoinPoint.proceed(Unknown Source) at fr.ifremer.isisfish.aspect.RuleAspect.makeTimedCall(RuleAspect.java:119) at fr.ifremer.isisfish.aspect.RuleAspect.initPreCall(RuleAspect.java:84) at rules.MPARuleBRUM_conditionnel_MultiSp_1__1556553279__240354642___AW_JoinPoint.proceed(Unknown Source) at rules.MPARuleBRUM_conditionnel_MultiSp_1__1556553279__240354642___AW_JoinPoint.invoke(Unknown Source) at rules.MPARuleBRUM_conditionnel_MultiSp.preAction(MPARuleBRUM_conditionnel_MultiSp.java) at simulators.DefaultSimulator.simulate(DefaultSimulator.java:203) at fr.ifremer.isisfish.simulator.launcher.InProcessSimulatorLauncher.localSimulateSameThread(InProcessSimulatorLauncher.java:392) at fr.ifremer.isisfish.simulator.launcher.InProcessSimulatorLauncher$SimThread.run(InProcessSimulatorLauncher.java:259) ERROR|22:28:53,906|InProcessSimulatorLauncher.java|428|localSimulateSameThread|Error during simulation org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: fr.ifremer.isisfish.entities.SpeciesImpl.population, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365) at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) at org.hibernate.collection.PersistentBag.iterator(PersistentBag.java:272) at rules.MPARuleBRUM_conditionnel_MultiSp.aw$original$_AW_$preAction$_AW_$rules_MPARuleBRUM_conditionnel_MultiSp(MPARuleBRUM_conditionnel_MultiSp.java:502) at rules.MPARuleBRUM_conditionnel_MultiSp_1__1556553279__240354642___AW_JoinPoint.proceed(Unknown Source) at fr.ifremer.isisfish.aspect.RuleAspect.makeTimedCall(RuleAspect.java:119) at fr.ifremer.isisfish.aspect.RuleAspect.initPreCall(RuleAspect.java:84) at rules.MPARuleBRUM_conditionnel_MultiSp_1__1556553279__240354642___AW_JoinPoint.proceed(Unknown Source) at rules.MPARuleBRUM_conditionnel_MultiSp_1__1556553279__240354642___AW_JoinPoint.invoke(Unknown Source) at rules.MPARuleBRUM_conditionnel_MultiSp.preAction(MPARuleBRUM_conditionnel_MultiSp.java) at simulators.DefaultSimulator.simulate(DefaultSimulator.java:203) at fr.ifremer.isisfish.simulator.launcher.InProcessSimulatorLauncher.localSimulateSameThread(InProcessSimulatorLauncher.java:392) at fr.ifremer.isisfish.simulator.launcher.InProcessSimulatorLauncher$SimThread.run(InProcessSimulatorLauncher.java:259) INFO|22:28:54,046|InProcessSimulatorLauncher.java|458|localSimulateSameThread|Simulation time: 53.228