Normal 0 false false false EN-US X-NONE X-NONE

Just had one of our users send us this crash report.  We are using an UltraTimelineView to display some icons on various days.  The code has been in production for months with no issue.  Any ideas what would cause this exception, when the user clicks on the form?

We are using Infragistics 2010 Vol 1 for Windows Forms.

System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'Infragistics.Win.UltraWinScrollBar.ScrollBarInfo'.
at Infragistics.Shared.DisposableObject.VerifyNotDisposed()
at Infragistics.Shared.SubObjectBase.NotifyPropChange(PropChangeInfo trigger)
at Infragistics.Shared.SubObjectBase.NotifyPropChange(Enum propId)
at Infragistics.Win.UltraWinScrollBar.ScrollBarInfo.set_Value(Int32 value)
at Infragistics.Win.UltraWinScrollBar.ScrollBarInfo.OnScroll(ScrollEventArgs e)
at Infragistics.Win.UltraWinScrollBar.ScrollBarInfo.OnScrollHelper(ScrollEventType type, Int32 newValue)
at Infragistics.Win.UltraWinScrollBar.ScrollBarInfo.SmallIncrement(ScrollButton direction)
at Infragistics.Win.UltraWinScrollBar.ScrollBarUIElement.OnElementClick(Object sender, UIElementEventArgs e)
at Infragistics.Win.ButtonUIElementBase.FireClickEvent()
at Infragistics.Win.ScrollButtonUIElement.OnClick()
at Infragistics.Win.ScrollButtonUIElement.OnMouseDown(MouseEventArgs e, Boolean adjustableArea, UIElement& captureMouseForElement)
at Infragistics.Win.ControlUIElementBase.ProcessMouseDownHelper(Object sender, MouseEventArgs e)
at Infragistics.Win.ControlUIElementBase.ProcessMouseDown(Object sender, MouseEventArgs e)
at Infragistics.Win.Utilities.ProcessEvent(Control control, ProcessEvent eventToProcess, EventArgs e)
at Infragistics.Win.UltraControlBase.OnMouseDown(MouseEventArgs e)
at Infragistics.Win.UltraWinSchedule.UltraMonthViewSingleBase.OnMouseDown(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)