invalid visual DependencyObject

[Terry Newton]

I am getting a stack dump out of my app (which has not changed in weeks and was working) with the following info:

Reference is not a valid visual DependencyObject.

   at System.Windows.Media.VisualTreeHelper.GetRelative(DependencyObject reference, RelativeKind relativeKind)
   at System.Windows.Media.VisualTreeHelper.GetChildrenCount(DependencyObject reference)
   at Telerik.Windows.Controls.DependencyObjectExtensions.<FindChildrenByType>d__0`1.MoveNext()
   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable`1 source)
   at Telerik.Windows.Controls.DependencyObjectExtensions.FindChildByType[T](DependencyObject source)
   at Telerik.Windows.Controls.SchedulerPresenterExtensions.TryFindResource(SchedulerPresenter presenter, String name)
   at Telerik.Windows.Controls.SchedulerAnimation.BeginViewTransitionAnimation(ViewTransitionMode mode)
   at Telerik.Windows.Controls.RadScheduler.OnViewModeChanged()
   at Telerik.Windows.Controls.RadScheduler.OnViewModeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at Telerik.Windows.PropertyMetadata.<>c__DisplayClass1.<Create>b__0(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object newValue, Object oldValue)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet, Boolean isSetByStyle, Boolean isSetByBuiltInStyle, PropertyInvalidationReason reason)
   at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.RadScheduler.set_ViewMode(SchedulerViewMode value)
   at rwCalendar.rwCalendar.CalendarMode_ChangedHandler()
   at rwCalendar.rwCalendar.Calendar_ButtonClick(Object sender, RoutedEventArgs e)
   at rwCalendar.rwCalendar.DayButton_Click(Object sender, RoutedEventArgs e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)

The only thing I can identify that may have impacted tis (in both my developement and production environments) is that last week we tried to upgrade to the latest version of your controls and had to revert to the older version because rather than fixing a problem that you had reported fixed it mad all our grids with embedded combo box columns through an exception and perhaps we did not back out cleanly.

I have attached a listing of the telerik components in my apps bin directory for my Dev environment for the app. 

I would appreciate any pointers about how to investigate this error.

Thanks much for any possible help.

Terry

 

[Terry Newton]

No thoughts, anyone?  This is happening when the calendar mode is being set to

Telerik.Windows.Controls.SchedulerViewMode.Week

or a similar value.  This was working previously, but it is not clear to me all the factors that influence the dependency object for calendar mode..

[Rosi]

Hello Terry Newton,

Could you please send us sample running project to test it locally? This will help us to investigate the problem and provide you with a solution.

Kind regards,
Rosi
the Telerik team

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