This error message is repeated several times in my .log file.
!ENTRY org.eclipse.ui 4 4 2013-10-25 14:04:05.845
!MESSAGE An internal error has occurred.
!STACK 0
org.eclipse.swt.SWTException: Widget is disposed
at org.eclipse.swt.SWT.error(SWT.java:4361)
at org.eclipse.swt.SWT.error(SWT.java:4276)
at org.eclipse.swt.SWT.error(SWT.java:4247)
at org.eclipse.swt.widgets.Widget.error(Widget.java:468)
at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:340)
at org.eclipse.swt.widgets.Tree.getItems(Tree.java:3251)
at com.freescale.core.ide.projectsview.views.ProjectsView.findElement(ProjectsView.java:2542)
at com.freescale.core.ide.projectsview.views.ProjectsView$RestoreExpandedElementCache.restore(ProjectsView.java:2510)
at com.freescale.core.ide.projectsview.views.ProjectsView$DeferredLoadingProviderCompletionListener$1.run(ProjectsView.java:1755)
at com.freescale.core.ide.projectsview.views.ProjectsView$20.runInUIThread(ProjectsView.java:1629)
at org.eclipse.ui.progress.UIJob$1.run(UIJob.java:96)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:155)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4159)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3772)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.block(ModalContext.java:173)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:388)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:507)
at org.eclipse.ui.internal.progress.ProgressMonitorJobsDialog.run(ProgressMonitorJobsDialog.java:275)
at org.eclipse.ui.internal.ide.application.IDEWorkbenchAdvisor.disconnectFromWorkspace(IDEWorkbenchAdvisor.java:518)
at org.eclipse.ui.internal.ide.application.IDEWorkbenchAdvisor.postShutdown(IDEWorkbenchAdvisor.java:351)
at org.eclipse.ui.internal.Workbench.shutdown(Workbench.java:2689)
at org.eclipse.ui.internal.Workbench.busyClose(Workbench.java:1119)
at org.eclipse.ui.internal.Workbench.access$16(Workbench.java:1002)
at org.eclipse.ui.internal.Workbench$17.run(Workbench.java:1183)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.Workbench.close(Workbench.java:1181)
at org.eclipse.ui.internal.Workbench.close(Workbench.java:1154)
at org.eclipse.ui.internal.WorkbenchWindow.busyClose(WorkbenchWindow.java:1169)
at org.eclipse.ui.internal.WorkbenchWindow.access$14(WorkbenchWindow.java:1140)
at org.eclipse.ui.internal.WorkbenchWindow$10.run(WorkbenchWindow.java:1204)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1202)
at org.eclipse.ui.internal.WorkbenchWindow.close(WorkbenchWindow.java:1214)
at org.eclipse.ui.internal.WorkbenchWindow$6.close(WorkbenchWindow.java:449)
at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer$11.shellClosed(WBWRenderer.java:580)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:98)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1077)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1062)
at org.eclipse.swt.widgets.Decorations.closeWidget(Decorations.java:309)
at org.eclipse.swt.widgets.Decorations.WM_CLOSE(Decorations.java:1694)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4530)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4991)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541)
at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:498)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4991)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(OS.java:2541)
at org.eclipse.swt.widgets.Shell.callWindowProc(Shell.java:498)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4623)
at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:341)
at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1627)
at org.eclipse.swt.widgets.Shell.windowProc(Shell.java:2069)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:4991)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2546)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3767)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
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:353)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:630)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:585)
at org.eclipse.equinox.launcher.Main.run(Main.java:1439)