com.ibm.team.repository.common.ItemNotFoundException: ?????

I work on a program to create a workitem automatic,
but for the following code ,always got the exception :
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com.ibm.team.repository.common.ItemNotFoundException: CRJAZ0215I The following record was not found in the database: com.ibm.team.workitem.common.internal.model.impl.WorkItemHandleImpl@18fc07d (stateId: <unset>, itemId: , origin: com.ibm.team.repository.client.internal.TeamRepository@196c67a, immutable: <unset>)
at com.ibm.team.repository.client.internal.ItemManager.internalFetchItem(ItemManager.java:1600)
at com.ibm.team.repository.client.internal.ItemManager.access$1(ItemManager.java:1557)
at com.ibm.team.repository.client.internal.ItemManager$AbstractStore.retrieveItem(ItemManager.java:194)
at com.ibm.team.repository.client.internal.ItemManager$CurrentStore.fetchItem(ItemManager.java:319)
at com.ibm.team.repository.client.internal.ItemManager.fetchPartialItem(ItemManager.java:1078)
at com.ibm.team.workitem.client.internal.AuditableClient.resolveAuditable(AuditableClient.java:134)
at com.ibm.issr.client.genworkitembatchAction.run(genworkitembatchAction.java:351)
at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
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 org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)
at org.eclipse.equinox.launcher.Main.run(Main.java:1311)
at org.eclipse.equinox.launcher.Main.main(Main.java:1287)
the workbenchpart title is :Project Explorer
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can you give me some advice about this error .




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IWorkItem workItem=null;
System.out.println("====22");
try {
workItem = auditableClient.resolveAuditable(handle, IWorkItem.SMALL_PROFILE, null);
} catch (TeamRepositoryException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
System.out.println("Created work item " + workItem.getId() + ".");