I am using InfragisticsWPF3.DataPresenter.ExcelExporter.v10.2 and we have a  XamDataGrid with the Export to Excel feature. After I sort a particular column and then Export to Excel the application Crashes with the exception

"Field named  was not found in data source: Record\r\nParameter name: FieldName"

I have the following code for the Export to Excel

private void ExecutedXLExportGridCommand(object sender_, ExecutedRoutedEventArgs e_)

    {

      if (!(e_.Parameter is string))

        return;

      switch (e_.Parameter as string)

      {

        case "MainGrid":

          ExportGrid(ux_gridStudyContent);

          break;

      }

    }

    private static void ExportGrid(DataPresenterBase grid_)

    {

      string _temporaryFile = string.Format("{0}\\{1}_PnLLink_Export.xls",

                                            Environment.GetFolderPath(Environment.SpecialFolder.InternetCache),

                                            Guid.NewGuid().ToString("N"));

      var _exporter = new DataPresenterExcelExporter();

      _exporter.Export(grid_, _temporaryFile, WorkbookFormat.Excel97To2003);

      Process.Start(_temporaryFile);

    }

The Export to Excel works fine when I do not sort any column