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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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java.lang.NullPointerException: 	at java.util.Hashtable.put(Hashtable.java:394)	at com.thortech.xl.gc.impl.common.DBFacade.retrieveRecord(Unknown Source)	at com.thortech.xl.gc.impl.common.DBFacade.getRecord(Unknown Source)	at com.thortech.xl.gc.impl.common.DBFacade.getTargetRecord(Unknown Source)	at com.thortech.xl.gc.impl.recon.DBReconTransportProvider.getFirstPage(Unknown Source)	at com.thortech.xl.gc.runtime.GCScheduleTask.execute(GCScheduleTask.java:103)	at com.thortech.xl.scheduler.tasks.SchedulerBaseTask.execute(SchedulerBaseTask.java:384)	at oracle.iam.scheduler.vo.TaskSupport.executeJob(TaskSupport.java:145)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at oracle.iam.scheduler.impl.quartz.QuartzJob.execute(QuartzJob.java:196)	at org.quartz.core.JobRunShell.run(JobRunShell.java:202)