Error while calling grid.EndUpdate()

I am getting Object reference not set to an instance of an object error when i call
grid.EndUpdate() . Following is the stacktrace i got

22700406: Object reference not set to an instance of an object. Stack Trace to follow...
: at Syncfusion.Windows.Forms.Grid.Grouping.GridTableDescriptor.EnsureSummaryDescriptors()
at Syncfusion.Grouping.Group.GetSummaries(Table parentTable, Boolean& summaryChanged)
at Syncfusion.Grouping.Element.GetSummaries(Table parentTable)
at Syncfusion.Windows.Forms.Grid.Grouping.GridTableControl.Update()
at Syncfusion.Windows.Forms.Grid.GridControlBase.EndUpdateModel(Boolean update, Boolean fromModel)
at Syncfusion.Windows.Forms.Grid.GridControlBase.EndUpdate(Boolean update)
at Syncfusion.Windows.Forms.Grid.Grouping.GridGroupingControl.EndUpdate(Boolean update)

Hi Sameer,

We were not able to reproduce the issue here. Is it possible for you to upload us a sample or modify any of our browser samples to reproduce the issue here? This will help us to analyse the issue further.

Best Regards,
Haneef

Hi Haneef,

I have function which moves visible columns following is the code snippet from source code

private void SetupPeopleViewGridLook()
{
lock(this._resultsGrid)
{
try
{
if this._resultsGrid.TableDescriptor.VisibleColumns.Count > 0)
{
this._resultsGrid.BeginUpdate();
int source = this._resultsGrid.TableDescriptor.VisibleColumns.IndexOf("Last Name");
if(source >= 0)
this._resultsGrid.TableDescriptor.VisibleColumns.Move(source, 0);
source = this._resultsGrid.TableDescriptor.VisibleColumns.IndexOf("First Name");
if(source >= 0)
this._resultsGrid.TableDescriptor.VisibleColumns.Move(source,1);
source = this._resultsGrid.TableDescriptor.VisibleColumns.IndexOf("Nick Name");
if(source >= 0)
this._resultsGrid.TableDescriptor.VisibleColumns.Move(source,2);
this._resultsGrid.TableDescriptor.EnsureSummaryDescriptors();
this._resultsGrid.EndUpdate(true); }
}
catch (Exception ex)
{
Logger.getInstance().logError("Error configuring people grid view.", ex);
throw new PresentationException("Error configuring people grid view.", ex);
}
}
}

This code is working in syncfusion 4.1 but not in 4.2

Please reply asap..
Thanks
Sameer