This is the event viewer description.
Suddenly it stopped working, and permanently hangs.
Aplicación: DigitalEditions.exe
Versión de Framework: v4.0.30319
Descripción: el proceso terminó debido a una excepción no controlada.
Información de la excepción: System.NullReferenceException
en DE.View.Automation.CustomMenuItemAutomationPeer.GetNameCore()
en System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
en System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
en System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
en System.Windows.Automation.Peers.AutomationPeer.UpdateSubtree()
en System.Windows.ContextLayoutManager.fireAutomationEvents()
en System.Windows.ContextLayoutManager.UpdateLayout()
en System.Windows.UIElement.UpdateLayout()
en System.Windows.Interop.HwndSource.SetLayoutSize()
en System.Windows.Interop.HwndSource.set_RootVisualInternal(System.Windows.Media.Visual)
en System.Windows.Interop.HwndSource.set_RootVisual(System.Windows.Media.Visual)
en System.Windows.Controls.Primitives.Popup.SetRootVisualToPopupRoot()
en System.Windows.Controls.Primitives.Popup.CreateWindow(Boolean)
en System.Windows.Controls.Primitives.Popup.OnIsOpenChanged(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex, System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EffectiveValueEntry, System.Windows.EffectiveValueEntry ByRef, Boolean, Boolean, System.Windows.OperationType)
en System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty, Boolean)
en System.Windows.Data.BindingExpressionBase.Invalidate(Boolean)
en System.Windows.Data.BindingExpression.TransferValue(System.Object, Boolean)
en System.Windows.Data.BindingExpression.ScheduleTransfer(Boolean)
en MS.Internal.Data.ClrBindingWorker.NewValueAvailable(Boolean, Boolean, Boolean)
en MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32, System.ComponentModel.ICollectionView, System.Object, Boolean)
en MS.Internal.Data.PropertyPathWorker.OnDependencyPropertyChanged(System.Windows.DependencyObject, System.Windows.DependencyProperty, Boolean)
en MS.Internal.Data.ClrBindingWorker.OnSourceInvalidation(System.Windows.DependencyObject, System.Windows.DependencyProperty, Boolean)
en System.Windows.Data.BindingExpression.HandlePropertyInvalidation(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.Data.BindingExpressionBase.OnPropertyInvalidation(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.Data.BindingExpression.OnPropertyInvalidation(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.DependentList.InvalidateDependents(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs)
en System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex, System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EffectiveValueEntry, System.Windows.EffectiveValueEntry ByRef, Boolean, Boolean, System.Windows.OperationType)
en System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty, System.Object, System.Windows.PropertyMetadata, Boolean, Boolean, System.Windows.OperationType, Boolean)
en System.Windows.DependencyObject.SetCurrentValueInternal(System.Windows.DependencyProperty, System.Object)
en System.Windows.Controls.MenuItem.OpenMenu()
en System.Windows.Controls.MenuItem.ClickHeader()
en System.Windows.Controls.MenuItem.HandleMouseDown(System.Windows.Input.MouseButtonEventArgs)
en System.Windows.Controls.MenuItem.OnMouseLeftButtonDown(System.Windows.Input.MouseButtonEventArgs)
en System.Windows.UIElement.OnMouseLeftButtonDownThunk(System.Object, System.Windows.Input.MouseButtonEventArgs)
en System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate, System.Object)
en System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)
en System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)
en System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
en System.Windows.UIElement.ReRaiseEventAs(System.Windows.DependencyObject, System.Windows.RoutedEventArgs, System.Windows.RoutedEvent)
en System.Windows.UIElement.OnMouseDownThunk(System.Object, System.Windows.Input.MouseButtonEventArgs)
en System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate, System.Object)
en System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)
en System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)
en System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
en System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)
en System.Windows.ContentElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs)
en System.Windows.Input.InputManager.ProcessStagingArea()
en System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs)
en System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport)
en System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawMouseActions, Int32, Int32, Int32)
en System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr, MS.Internal.Interop.WindowMessage, IntPtr, IntPtr, Boolean ByRef)
en System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
en MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
en MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
en System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
en System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
en System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
en MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
en MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
en System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
en System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)
en System.Windows.Application.RunDispatcher(System.Object)
en System.Windows.Application.RunInternal(System.Windows.Window)
en System.Windows.Application.Run(System.Windows.Window)
en System.Windows.Application.Run()
en DE.App.Main()
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