Hi,

I used ultrawingrid excel exporter with RowLayoutGroupInfo and i got Object reference error.

If I don't use RowLayoutGroupInfo and i can export to excel successfully.

I used 11.1.20111.1003 version.

Kindly advice.

Below are the stack trace.

   at Infragistics.Win.UltraWinGrid.UltraGridBand.GetSummaryLayoutPreferredSize(SummaryDisplayAreaContext context)
   at Infragistics.Win.UltraWinGrid.SummaryValuesCollection.GetFixedSummaryLineHeight(SummaryDisplayAreaContext context, Int32 level)
   at Infragistics.Win.UltraWinGrid.SummaryValuesCollection.GetFixedFooterAreaHeight(SummaryDisplayAreaContext context)
   at Infragistics.Win.UltraWinGrid.SummaryValuesCollection.GetSummaryFooterHeight(SummaryDisplayAreaContext context)
   at Infragistics.Win.UltraWinGrid.UltraGridSummaryRow.get_BaseHeight()
   at Infragistics.Win.UltraWinGrid.UltraGridRow.get_TotalHeight()
   at Infragistics.Win.UltraWinGrid.VisibleRow.GetTotalHeight(Boolean adjustForOverlappedBorders)
   at Infragistics.Win.UltraWinGrid.VisibleRow.GetTotalHeight()
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.IsRowFullyVisible(ScrollbarVisibility colScrollbarVisibility, VisibleRow visibleRow)
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.IsFirstScrollableRowVisible(ScrollbarVisibility colScrollbarVisibility)
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.IsFirstScrollableRowVisible()
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.ResetScrollInfo()
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.RegenerateVisibleRows(Boolean resetScrollInfo)
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.RegenerateVisibleRows()
   at Infragistics.Win.UltraWinGrid.RowScrollRegion.WillScrollbarBeShown(ScrollbarVisibility assumeColScrollbarsVisible)
   at Infragistics.Win.UltraWinGrid.ScrollRegionBase.WillScrollbarBeShown()
   at Infragistics.Win.UltraWinGrid.DataAreaUIElement.AddIntersectionHelper(UIElementsCollection oldElements, RowScrollRegion rsr, ColScrollRegion csr, RowScrollRegion rsrPrevious, ColScrollRegion csrPrevious, Boolean lastVisibleRsr, Boolean lastVisibleCsr)
   at Infragistics.Win.UltraWinGrid.DataAreaUIElement.PositionChildElements()
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UltraWinGrid.DataAreaUIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UltraWinGrid.DataAreaUIElement.set_Rect(Rectangle value)
   at Infragistics.Win.UltraWinGrid.UltraGridUIElement.PositionChildElements()
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UltraWinGrid.UltraGridUIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(Boolean recursive)
   at Infragistics.Win.UltraWinGrid.UltraGridUIElement.InternalInitializeRect(Boolean verify)
   at Infragistics.Win.UltraWinGrid.UltraGridLayout.InternalInitializeUltraGridUIElementRect(Boolean verify, Boolean onlyWhenEmpty)
   at Infragistics.Win.UltraWinGrid.RowsCollection.SyncRows()
   at Infragistics.Win.UltraWinGrid.RowsCollection.EnsureNotDirty()
   at Infragistics.Win.UltraWinGrid.RowsCollection.get_Count()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.GetRowSelectorNumberWidth()
   at Infragistics.Win.UltraWinGrid.UltraGridLayout.GetRowSelectorWidthDefault(UltraGridBand band)
   at Infragistics.Win.UltraWinGrid.UltraGridBand.get_RowSelectorWidthResolved()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.get_RowSelectorExtent()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.GetExtentLayout(Boolean minimum, BandOrigin bandOrigin)
   at Infragistics.Win.UltraWinGrid.UltraGridBand.GetExtentLayout()
   at Infragistics.Win.UltraWinGrid.UltraGridGroup.CalcLayoutHelper(Int32 bandExtent)
   at Infragistics.Win.UltraWinGrid.UltraGridGroup.CalcLayoutHelper()
   at Infragistics.Win.UltraWinGrid.UltraGridGroup.VerifyRowLayoutCache()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.VerifyRowLayoutCache()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.get_LayoutOrderedVisibleColumnHeaders()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.GetAllOrderedHeaders()
   at Infragistics.Win.UltraWinGrid.UltraGridBand.CalculateBandMetrics(UltraGridBand priorBand)
   at Infragistics.Win.UltraWinGrid.BandsCollection.CalculateBandMetrics(Int32 pass)
   at Infragistics.Win.UltraWinGrid.BandsCollection.CalculateBandMetrics()
   at Infragistics.Win.UltraWinGrid.ColScrollRegionsCollection.InitializeMetricsHelper()
   at Infragistics.Win.UltraWinGrid.ColScrollRegionsCollection.InitializeMetrics()
   at Infragistics.Win.UltraWinGrid.UltraGridLayout.ApplyLoadedBands()
   at Infragistics.Win.UltraWinGrid.UltraGrid.Export(IUltraGridExporter exporter)
   at Infragistics.Win.UltraWinGrid.ExcelExport.UltraGridExcelExporter.Export(UltraGrid grid, Worksheet worksheet, Int32 startRow, Int32 startColumn)
   at Infragistics.Win.UltraWinGrid.ExcelExport.UltraGridExcelExporter.Export(UltraGrid grid, WorkbookFormat workbookFormat)
   at Infragistics.Win.UltraWinGrid.ExcelExport.UltraGridExcelExporter.Export(UltraGrid grid, String fileName, WorkbookFormat workbookFormat)
   at Infragistics.Win.UltraWinGrid.ExcelExport.UltraGridExcelExporter.Export(UltraGrid grid, String fileName)
   at nSolution.mdiMain.ExportExcelByUltraGrid(Object ugExcel, String strFileName) in D:\PROJECTS\nSolution\nSolution\nSolution\nSolution\mdiMain.vb:line 2162