Requality

Шаги:
1. Создал проект.
2. Импортировал doc документ.
3. Открыл его.
4. Обработал процессором.
5. Удалил требование, в которое попали все требования из этого документа как подтребования.
6. При переключении в браузер с открытым документом получаю исключение:

eclipse.buildId=M20110210-1200
java.version=1.6.0_22
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_US
Framework arguments:  -product org.eclipse.epp.package.linuxtools.product
Command-line arguments:  -os linux -ws gtk -arch x86 -product org.eclipse.epp.package.linuxtools.product

Error
Fri Sep 30 13:00:27 MSD 2011
Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".

org.eclipse.core.runtime.AssertionFailedException: null argument:
    at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:85)
    at org.eclipse.core.runtime.Assert.isNotNull(Assert.java:73)
    at org.eclipse.jface.viewers.StructuredViewer.assertElementsNotNull(StructuredViewer.java:595)
    at org.eclipse.jface.viewers.StructuredViewer.getRawChildren(StructuredViewer.java:990)
    at org.eclipse.jface.viewers.ColumnViewer.getRawChildren(ColumnViewer.java:703)
    at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1332)
    at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:391)
    at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:896)
    at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:601)
    at org.eclipse.jface.viewers.AbstractTreeViewer$1.run(AbstractTreeViewer.java:801)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:778)
    at org.eclipse.jface.viewers.TreeViewer.createChildren(TreeViewer.java:644)
    at org.eclipse.jface.viewers.AbstractTreeViewer.createChildren(AbstractTreeViewer.java:749)
    at org.eclipse.jface.viewers.AbstractTreeViewer.internalInitializeTree(AbstractTreeViewer.java:1492)
    at org.eclipse.jface.viewers.TreeViewer.internalInitializeTree(TreeViewer.java:833)
    at org.eclipse.jface.viewers.AbstractTreeViewer$5.run(AbstractTreeViewer.java:1476)
    at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1422)
    at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403)
    at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1383)
    at org.eclipse.jface.viewers.AbstractTreeViewer.inputChanged(AbstractTreeViewer.java:1469)
    at org.eclipse.jface.viewers.ContentViewer.setInput(ContentViewer.java:274)
    at org.eclipse.jface.viewers.StructuredViewer.setInput(StructuredViewer.java:1664)
    at com.unitesk.requality.eclipse.editors.browser.ReqMarkerOutlinePage.createControl(ReqMarkerOutlinePage.java:82)
    at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:137)
    at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:408)
    at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:751)
    at org.eclipse.ui.views.contentoutline.ContentOutline.partBroughtToTop(ContentOutline.java:212)
    at org.eclipse.ui.part.PageBookView$4.partBroughtToTop(PageBookView.java:1018)
    at org.eclipse.ui.internal.PartListenerList2$2.run(PartListenerList2.java:85)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.core.runtime.Platform.run(Platform.java:888)
    at org.eclipse.ui.internal.PartListenerList2.fireEvent(PartListenerList2.java:55)
    at org.eclipse.ui.internal.PartListenerList2.firePartBroughtToTop(PartListenerList2.java:83)
    at org.eclipse.ui.internal.PartService.firePartBroughtToTop(PartService.java:212)
    at org.eclipse.ui.internal.WorkbenchPagePartList.firePartBroughtToTop(WorkbenchPagePartList.java:76)
    at org.eclipse.ui.internal.WorkbenchPagePartList.fireActiveEditorChanged(WorkbenchPagePartList.java:52)
    at org.eclipse.ui.internal.PartList.setActiveEditor(PartList.java:162)
    at org.eclipse.ui.internal.WorkbenchPage.makeActiveEditor(WorkbenchPage.java:1281)
    at org.eclipse.ui.internal.WorkbenchPage.updateActivePart(WorkbenchPage.java:1226)
    at org.eclipse.ui.internal.WorkbenchPage.partAdded(WorkbenchPage.java:1704)
    at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:217)
    at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:778)
    at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:677)
    at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:638)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2860)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2768)
    at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2760)
    at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2711)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2707)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2691)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2682)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:582)
    at com.unitesk.requality.eclipse.handlers.document.OpenDocumentHandler.execute(OpenDocumentHandler.java:36)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
    at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:178)
    at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
    at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)
    at com.unitesk.requality.eclipse.views.actions.OpenAction.runAction(OpenAction.java:53)
    at com.unitesk.requality.eclipse.views.actions.OpenAction.run(OpenAction.java:39)
    at org.eclipse.ui.actions.RetargetAction.run(RetargetAction.java:221)
    at org.eclipse.ui.navigator.CommonNavigatorManager$3.open(CommonNavigatorManager.java:185)
    at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48)
    at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:845)
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
    at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
    at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
    at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:843)
    at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1131)
    at org.eclipse.ui.navigator.CommonViewer.handleOpen(CommonViewer.java:462)
    at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1235)
    at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:264)
    at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:258)
    at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:298)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1258)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3540)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3161)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
    at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    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:369)
    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:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:616)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1408)