I keep getting this exception whenever I try to bind Range I get this exception:

  e.ExceptionObject {System.NullReferenceException: Object reference not set to an instance of an object.

   at Infragistics.Controls.XamZoombar.UpdateThumb(Range range)

   at Infragistics.Controls.XamZoombar.UpdateThumb()

   at Infragistics.Controls.XamZoombar.UpdateElementPositions()

   at Infragistics.Controls.XamZoombar.SizeUpdated()

   at Infragistics.Controls.XamZoombar.XamZoombar_LayoutUpdated(Object sender, EventArgs e)

   at System.Windows.FrameworkElement.OnLayoutUpdated(Object sender, EventArgs e)

   at MS.Internal.JoltHelper.RaiseEvent(IntPtr target, UInt32 eventId, IntPtr coreEventArgs, UInt32 eventArgsTypeIndex)} System.Exception {System.NullReferenceException}

 

 

Here is the XAML:

<ig:XamZoombar 

                Name="ZoomBar"

                Style="{StaticResource ZoomZoomBarStyle}"

                Maximum="{Binding   Path=ZoomBarRange.End,

                                    Converter={StaticResource DateTimeToOADateConv}, 

                                    Mode=OneWay}"                

                Minimum="{Binding   Path=ZoomBarRange.Start,

                                    Converter={StaticResource DateTimeToOADateConv}, 

                                    Mode=OneWay}"                 

                SmallChange="{Binding Path=SelectedZoomLevel.Span.TotalDays}"

                LargeChange="{Binding Path=SelectedZoomLevel.Span.TotalDays}"

                Range="{Binding Path=Range,

                                Converter={StaticResource TimeRangeToIGRangeConv},

                                Mode=TwoWay}" />

 

If I comment out the Range attribute the exception goes away.  I placed a breakpoint in both the getter and the setter for Range and ZoomBarRange.  Neither of them are ever hit before the exception is thrown.  Is this a bug in the ZoomBar?