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java.lang.NullPointerException: 	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at net.sf.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:96)	at net.sf.hibernate.type.ComponentType.getPropertyValue(ComponentType.java:179)	at net.sf.hibernate.type.ComponentType.getPropertyValues(ComponentType.java:205)	at net.sf.hibernate.type.ComponentType.copy(ComponentType.java:285)	at net.sf.hibernate.type.MapType.copy(MapType.java:52)	at net.sf.hibernate.type.TypeFactory.copy(TypeFactory.java:284)	at net.sf.hibernate.impl.SessionImpl.doCopy(SessionImpl.java:4033)	at net.sf.hibernate.impl.SessionImpl.saveOrUpdateCopy(SessionImpl.java:3971)	at com.qxlva.dao.BaseDao.update(BaseDao.java:81)	at com.qxlva.dao.BaseDaoTest.testUpdate(BaseDaoTest.java:355)	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(Unknown Source)	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.application.AppMain.main(Unknown Source)