If I set the DataRecord to Collasped in a InitializeRecordEvent handler I will get intermittent hidden records and  UnhandledExceptions at the application level when scrolling the window. Has anyone seen this?

I am using 9.1.

/*****************Handler**************/

   private void PlanGridRecordInit(object sender, InitializeRecordEventArgs e)
        {
            DataRecord rec = e.Record as DataRecord;
            Infragistics.Windows.DataPresenter.CellCollection cells = rec.Cells;
            double RelNo = double.Parse(cells["RelNo"].Value.ToString());
           
            if (currentRelease != 0&& RelNo != currentRelease)
                rec.Visibility = Visibility.Collapsed;
            else
                rec.Visibility = Visibility.Visible;

        }

/******************XAML*********************************/

                <igDP:XamDataGrid  Grid.Row="3" Drop="PlanListDrop" PreviewKeyUp="PlanListXFind" Name="PlanListX" EditModeEnded="PlanChanged" 
                                  SelectedItemsChanged="PlanListXSelectionChanged" Theme="Aero" AllowDrop="True"  Background="LightGoldenrodYellow"
                                  RecordsDeleted="DeletedRecord" RecordsDeleting="DeletingRecord"
                                  GroupByAreaLocation="None" FontSize="9" InitializeRecord="PlanGridRecordInit" Loaded="PlanXLoaded">
                    <igDP:XamDataGrid.FieldSettings>
                        <igDP:FieldSettings  CellHeight="19"  LabelHeight="18"  LabelClickAction="Nothing"/>
                    </igDP:XamDataGrid.FieldSettings>
                    <igDP:XamDataGrid.Resources>

                        <Style TargetType="{x:Type igDP:DataRecordCellArea}">
                            <Setter Property="BackgroundActive">
                                <Setter.Value>
                                    <LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
                                        <GradientStop Color="LightSalmon" Offset="0"/>
                                        <GradientStop Color="White" Offset="1"/>
                                    </LinearGradientBrush>
                                </Setter.Value>
                            </Setter>
                            <Setter Property="BorderActiveBrush" Value="#FF000000"/>
                            <Style.Triggers>
                                <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Record.DataItem.Operation}" Value="{x:Null}">
                                    <Setter Property="Background" Value="LightSteelBlue" />
                                </DataTrigger>
                                <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Record.DataItem.Operation}" Value="100">
                                    <Setter Property="Background" Value="LightSteelBlue" />
                                </DataTrigger>
                                <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Record.DataItem.InUse}" Value="True">
                                    <Setter Property="Background" Value="Red" />
                                    <Setter Property="Foreground" Value="White" />
                                </DataTrigger>
                                <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Record.DataItem.Status}" Value="D">
                                    <Setter Property="Background" Value="Black" />
                                    <Setter Property="Foreground" Value="White" />
                                </DataTrigger>
                            </Style.Triggers>
                        </Style>

                        <Style TargetType="{x:Type igEditors:XamNumericEditor}" BasedOn="{StaticResource XamNumericEditor}" >
                            <Setter Property="HorizontalContentAlignment" Value="Left" />
                        </Style>
                        <ContextMenu x:Key="RecordContextMenu">
                            <MenuItem Header="Request Preq" Click="RequestPreqClick" />
                            <MenuItem Header="Copy OD and Wall Down" Click="CopyODWallDown" />
                            <MenuItem Header="Clear OD and Wall Down" Click="ClearODWallDown" />
                            <MenuItem Header="Copy QtyPln and QtyU Down" Click="CopyPlnDown" />
                            <MenuItem Header="Clear QtyPln and QtyU Down" Click="ClearPlnDown" />
                            <MenuItem Header="Copy Length Down" Click="CopyLengthDown" />
                            <MenuItem Header="Clear Length Down" Click="ClearLengthDown" />
                            <MenuItem Header="Create New Product" Click="newProduct_Click" />
                            <MenuItem Header="Compare Product Revs" Click="ProductCompare_Click" />
                        </ContextMenu>
                        <ContextMenu x:Key="OrdNumMenu">
                            <MenuItem Header="Show Schedule" Click="ShowSchedClick" />
                        </ContextMenu>
                        <Style TargetType="{x:Type igDP:CellValuePresenter}">
                            <Setter Property="ContextMenu" Value="{StaticResource RecordContextMenu}" />
                            <Setter Property="BackgroundSelected" Value="LightGray"/>
     
                        </Style>


                    </igDP:XamDataGrid.Resources>
                    <igDP:XamDataGrid.FieldLayoutSettings>
                        <igDP:FieldLayoutSettings AllowAddNew="False" AddNewRecordLocation="OnBottom" 
                                              HighlightAlternateRecords="True" />
                    </igDP:XamDataGrid.FieldLayoutSettings>
                  
                </igDP:XamDataGrid>