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Crashing in new win forms 2009 hotfix build 2012
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We have made zero code changes between win forms 2009.1000 and the hot fix 2009.2012 versions but now on doing this line of code

ultraTree1->ActiveNode=keyNode;

our program crashs as in the stack dump at the end of this post

Is this a known problem and will be fixed in the next hot fix ?
Or is there a work round etc?
we need the2009.2012 hot fix for other charting reasons so we cant go back
Any fast help appreciated we are mid beta release here :(


System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.

Parameter name: index
   at System.Collections.ArrayList.get_Item(Int32 index)
   at Infragistics.Win.UltraWinTree.NodeClientAreaUIElement.PositionChildElements()
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement,Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements()
   at Infragistics.Win.UltraWinTree.UltraTreeUIElement.PositionChildElements()
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement,Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements()
   at Infragistics.Win.UltraWinTree.UltraTreeNode.BringIntoViewHelper(Boolean includeChildNodes,Boolean includeHorizontal, Boolean includeVertical, Boolean leftOnly)
   at Infragistics.Win.UltraWinTree.UltraTreeNode.BringIntoViewHelper(Boolean includeChildNodes, Boolean includeHorizontal)
   at Infragistics.Win.UltraWinTree.UltraTree.SetActiveNode(UltraTreeNode node, Boolean bringIntoView, Boolean adjustHorizontalPosition)
   at Infragistics.Win.UltraWinTree.UltraTree.set_ActiveNode(UltraTreeNode value)
   at Program.Main.ultraTree1_Build(Int32 mode)
   at Program.Main.Treeview(Int32 type)

Thanks :¬)