app crash

[Kennet]

This is realy strange. Sometimes my app chrashes when I puch any button on my usercontrol. My app have several usercontrolsthat I switc between, one have RadGrid, and dreag drop.  This UC don't have any dragdrop code or a grid.

here is part of the stacktrace pointing at a "RadDragAndDropManager" that I don't havein my prject.

Any deas?, I' using version 2009.3.1219.35

System.NullReferenceException was unhandled
  Message="Object reference not set to an instance of an object."
  Source="Telerik.Windows.Controls"
  StackTrace:
       vid Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.OpenPopup() i c:\Builds\WPF_Scrum\Core_WPF_2009_Q3_SP1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:rad 924
       vid Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.StartDragging() i c:\Builds\WPF_Scrum\Core_WPF_2009_Q3_SP1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:rad 884
       vid Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.TryStartDrag(IMouseEventArgs e) i c:\Builds\WPF_Scrum\Core_WPF_2009_Q3_SP1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:rad 799
       vid Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.OnTrackedElementMouseMoveInternal(IMouseEventArgs e) i c:\Builds\WPF_Scrum\Core_WPF_2009_Q3_SP1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:rad 749
       vid Telerik.Windows.Controls.DragDrop.RadDragAndDropManager.OnCoverRectangleMouseMove(Object sender, MouseEventArgs e) i c:\Builds\WPF_Scrum\Core_WPF_2009_Q3_SP1\Sources\Development\Core\Controls\DragDrop\RadDragAndDropManager.cs:rad 684

[Valentin.Stoychev]

Hello Kennet,

Is it possible to open a support ticket and to send us a sample project where this is reproducible. We are not aware of such problem and is most probably related to a specific scenario.

All the best,
Valentin.Stoychev
the Telerik team

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[Frédéric]

I got a similar issue and found the solution here

http://www.telerik.com/community/forums/wpf/draganddrop/setallowdrag-crash.aspx

I suggest that Telerik improve a error message