Hi all!

After upgrading from 15.1 to 15.2 we have serious Problems with one of our grid.

The grid have 3 Groups and in 1 Group a summary.

Me.Grid_Calender.DisplayLayout.Bands(0).Groups.Add("TimeDiffe")

Me.Grid_Calender.DisplayLayout.Bands(0).Groups("TimeDiffe").Columns.Add(.Columns("TimeDiffMinutes"))

Me.Grid_Calender.DisplayLayout.Bands(0).Groups("TimeDiffe").Columns.Add(.Columns("TimeDiffHours"))

Me.Grid_Calender.DisplayLayout.Bands(0).Groups("TimeDiffe").Header.Caption = "Difference to Time model"

Me.Grid_Calender.DisplayLayout.Bands(0).Groups("TimeDiffe").Header.Appearance.BackColor = Color.FromArgb(67, 168, 152)

.SummaryFooterCaption = "Time difference in minutes"

.Override.SummaryDisplayArea = UltraWinGrid.SummaryDisplayAreas.TopFixed

.Override.SummaryFooterAppearance.FontData.Bold = DefaultableBoolean.True

.Summaries.Add("TimeDiffTotal", UltraWinGrid.SummaryType.Sum, .Columns("TimeDiffMinutes"), UltraWinGrid.SummaryPosition.UseSummaryPositionColumn)

.Summaries("TimeDiffTotal").DisplayFormat = "{0:#,##0}" & " m"

.Summaries("TimeDiffTotal").Appearance.TextHAlign = HAlign.Right

.Summaries.Add("TimeDiffHours", UltraWinGrid.SummaryType.Sum, .Columns("TimeDiffHours"), UltraWinGrid.SummaryPosition.UseSummaryPositionColumn)

.Summaries("TimeDiffHours").DisplayFormat = "{0:#,##0.00}" & " h"

.Summaries("TimeDiffHours").Appearance.TextHAlign = HAlign.Right

This code worked well in 15.1. Now we got follwoing error:

system.NullReferenceException: Object reference not set to an instance of an object.
   at Infragistics.Win.UltraWinGrid.UltraGridGroup.AlignHeaderInFixedHeaderArea(Rectangle& headerRect, Rectangle& fixedHeaders, BandHeaderMetricsCache bandHeaderMetricsCache)
   at Infragistics.Win.UltraWinGrid.UltraGridGroup.CalculateHeaderRect(Rectangle& headerRect, Rectangle& fixedHeaderRect, BandHeaderMetricsCache bandHeaderMetricsCache)
   at Infragistics.Win.UltraWinGrid.UltraGridColumn.CalculateHeaderRect(Rectangle& rcHeader, Rectangle& prcFixedHeaders, BandHeaderMetricsCache bandHeaderMetricsCache)
   at Infragistics.Win.UltraWinGrid.FixedSummaryLineUIElement.GetSummaryLocation(UltraGridColumn column, Int32& x, Int32& width)
   at Infragistics.Win.UltraWinGrid.FixedSummaryLineUIElement.PositionChildElements()
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UltraWinGrid.RowColRegionIntersectionUIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   at Infragistics.Win.UltraWinGrid.DataAreaUIElement.VerifyChildElements(ControlUIElementBase controlElement, Boolean recursive)
   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.UltraGridLayout.GetUIElement(Boolean verify, Boolean forceInitializeRect)
   at Infragistics.Win.UltraWinGrid.UltraGrid.OnPaint(PaintEventArgs pe)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

The Group only work well and also only the summary work well.

But not togeter....any ideas?

rgds