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java.lang.NullPointerException: 	at org.hibernate.tuple.AbstractTuplizer.createProxy(AbstractTuplizer.java:249)	at org.hibernate.persister.entity.BasicEntityPersister.createProxy(BasicEntityPersister.java:2813)	at org.hibernate.event.def.DefaultLoadEventListener.createProxyIfNecessary(DefaultLoadEventListener.java:218)	at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:163)	at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:79)	at org.hibernate.impl.SessionImpl.internalLoad(SessionImpl.java:655)	at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:261)	at org.hibernate.type.EntityType.resolve(EntityType.java:286)	at org.hibernate.engine.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:105)	at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:510)	at org.hibernate.loader.Loader.doQuery(Loader.java:420)	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:211)	at org.hibernate.loader.Loader.loadEntity(Loader.java:1312)	at org.hibernate.loader.entity.EntityLoader.load(EntityLoader.java:116)	at org.hibernate.loader.entity.EntityLoader.load(EntityLoader.java:101)	at org.hibernate.persister.entity.BasicEntityPersister.load(BasicEntityPersister.java:2461)	at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:350)	at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:331)	at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:113)	at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:167)	at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:79)	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:621)	at org.hibernate.impl.SessionImpl.get(SessionImpl.java:614)	at au.com.siemens.ecs.spct.command.CreateTrailCommandTest.step1_execCommand(CreateTrailCommandTest.java:109)	at au.com.siemens.ecs.spct.command.CreateTrailCommandTest.testCreateTrailUsingCommand(CreateTrailCommandTest.java:64)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at com.intellij.rt.execution.junit2.JUnitStarter.main(JUnitStarter.java:31)