If I have a RadgridView and group by a column, colapse all the rows, then right click on one of the rows (on the blue group name in the RadGridView) I get the following error:
Object reference not set to an instance of an object.
at Telerik.WinControls.UI.RadGridView.ValidateColumnChange(GridViewColumn column)
at Telerik.WinControls.UI.GridViewTemplate.SetCurrentColumn(GridViewColumn column, Boolean update, Boolean shift, Boolean control)
at Telerik.WinControls.UI.BaseGridBehavior.SetCurrentPosition(GridRowElement row, GridCellElement cell)
at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDownRight(MouseEventArgs e)
at Telerik.WinControls.UI.BaseGridBehavior.OnMouseDown(MouseEventArgs e)
at Telerik.WinControls.UI.RadGridView.OnMouseDown(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
at Telerik.WinControls.RadControl.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)