GTK error

knime stack trace

Thread [main] (Suspended)   
    owns: RunnableLock  (id=417)   
    OS._gtk_enumerate_printers(long, long, long, boolean) line: not available [native method]   
    OS.gtk_enumerate_printers(long, long, long, boolean) line: 10232   
    Printer.getPrinterList() line: 101   
    PrintAction.calculateEnabled() line: 45   
    PrintAction(WorkbenchPartAction).isEnabled() line: 123   
    RetargetAction.setActionHandler(IAction) line: 273   
    RetargetAction.partActivated(IWorkbenchPart) line: 155   
    PartListenerList$1.run() line: 72   
    SafeRunner.run(ISafeRunnable) line: 42   
    Platform.run(ISafeRunnable) line: 888   
    PartListenerList.fireEvent(SafeRunnable, IPartListener, IWorkbenchPart, String) line: 57   
    PartListenerList.firePartActivated(IWorkbenchPart) line: 70   
    PartService.firePartActivated(IWorkbenchPartReference) line: 187   
    PartService.setActivePart(IWorkbenchPartReference) line: 306   
    WWinPartService.updateActivePart() line: 134   
    WWinPartService.access$0(WWinPartService) line: 125   
    WWinPartService$WWinListener.partDeactivated(IWorkbenchPartReference) line: 50   
    PartListenerList2$4.run() line: 115   
    SafeRunner.run(ISafeRunnable) line: 42   
    Platform.run(ISafeRunnable) line: 888   
    PartListenerList2.fireEvent(SafeRunnable, IPartListener2, IWorkbenchPartReference, String) line: 55   
    PartListenerList2.firePartDeactivated(IWorkbenchPartReference) line: 113   
    PartService.firePartDeactivated(IWorkbenchPartReference) line: 242   
    PartService.setActivePart(IWorkbenchPartReference) line: 300   
    WorkbenchPagePartList.fireActivePartChanged(IWorkbenchPartReference, IWorkbenchPartReference) line: 57   
    WorkbenchPagePartList(PartList).setActivePart(IWorkbenchPartReference) line: 136   
    WorkbenchPage.setActivePart(IWorkbenchPart, boolean) line: 3636   
    WorkbenchPage.internalActivate(IWorkbenchPart, boolean) line: 691   
    WorkbenchPage.activate(IWorkbenchPart) line: 663   
    WorkbenchPage.busyOpenEditorBatched(IEditorInput, String, boolean, int, IMemento) line: 2957   
    WorkbenchPage.busyOpenEditor(IEditorInput, String, boolean, int, IMemento) line: 2850   
    WorkbenchPage.access$11(WorkbenchPage, IEditorInput, String, boolean, int, IMemento) line: 2842   
    WorkbenchPage$10.run() line: 2793   
    BusyIndicator.showWhile(Display, Runnable) line: 70   
    WorkbenchPage.openEditor(IEditorInput, String, boolean, int, IMemento) line: 2789   
    WorkbenchPage.openEditor(IEditorInput, String, boolean, int) line: 2773   
    WorkbenchPage.openEditor(IEditorInput, String) line: 2756   
    NewWorkflowWizard$2.run() line: 324   
    RunnableLock.run() line: 35   
    UISynchronizer(Synchronizer).runAsyncMessages(boolean) line: 136   
    Display.runAsyncMessages(boolean) line: 3774   
    Display.readAndDispatch() line: 3412   
    ModalContext$ModalContextThread.block() line: 173   
    ModalContext.run(IRunnableWithProgress, boolean, IProgressMonitor, Display) line: 388   
    WizardDialog.run(boolean, boolean, IRunnableWithProgress) line: 1029   
    NewWorkflowWizard.performFinish() line: 220   
    WizardDialog.finishPressed() line: 827   
    WizardDialog.buttonPressed(int) line: 432   
    Dialog$2.widgetSelected(SelectionEvent) line: 624   
    TypedListener.handleEvent(Event) line: 248   
    EventTable.sendEvent(Event) line: 84   
    Display.sendEvent(EventTable, Event) line: 4454   
    Button(Widget).sendEvent(Event) line: 1388   
    Display.runDeferredEvents() line: 3799   
    Display.readAndDispatch() line: 3409   
    WizardDialog(Window).runEventLoop(Shell) line: 825   
    WizardDialog(Window).open() line: 801   
    NewWorkflowAction.run() line: 156   
    NewWorkflowAction(Action).runWithEvent(Event) line: 498   
    ActionContributionItem.handleWidgetSelection(Event, boolean) line: 584   
    ActionContributionItem.access$2(ActionContributionItem, Event, boolean) line: 501   
    ActionContributionItem$5.handleEvent(Event) line: 411   
    EventTable.sendEvent(Event) line: 84   
    Display.sendEvent(EventTable, Event) line: 4454   
    MenuItem(Widget).sendEvent(Event) line: 1388   
    Display.runDeferredEvents() line: 3799   
    Display.readAndDispatch() line: 3409   
    Workbench.runEventLoop(Window$IExceptionHandler, Display) line: 2701   
    Workbench.runUI() line: 2665   
    Workbench.access$4(Workbench) line: 2499   
    Workbench$7.run() line: 679   
    Realm.runWithDefault(Realm, Runnable) line: 332   
    Workbench.createAndRunWorkbench(Display, WorkbenchAdvisor) line: 668   
    PlatformUI.createAndRunWorkbench(Display, WorkbenchAdvisor) line: 149   
    KNIMEApplication.start(IApplicationContext) line: 130   
    EclipseAppHandle.run(Object) line: 196   
    EclipseAppLauncher.runApplication(Object) line: 110   
    EclipseAppLauncher.start(Object) line: 79   
    EclipseStarter.run(Object) line: 344   
    EclipseStarter.run(String[], Runnable) line: 179   
    NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]   
    NativeMethodAccessorImpl.invoke(Object, Object[]) line: 57   
    DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 43   
    Method.invoke(Object, Object...) line: 606   
    Main.invokeFramework(String[], URL[]) line: 622   
    Main.basicRun(String[]) line: 577   
    Main.run(String[]) line: 1410   
    Main.main(String[]) line: 1386