Hi Mike,

I am facing the same problem refer below trace.

Error is

Key Not Found

Parameter Name:key

at Infragistics.Shared.KeyedSubObjectsCollectionBase.GetItem(String key)
at Infragistics.Win.UltraWinGrid.ColumnsCollection.get_Item(String key)
at Project_Name.frmMain.ugVisitIDList_InitializeLayout(Object sender, InitializeLayoutEventArgs e)
at Infragistics.Win.UltraWinGrid.UltraGrid.OnInitializeLayout(InitializeLayoutEventArgs e)
at Infragistics.Win.UltraWinGrid.UltraGrid.FireEvent(GridEventIds id, EventArgs e)
at Infragistics.Win.UltraWinGrid.UltraGridLayout.ApplyLoadedBands()
at Infragistics.Win.UltraWinGrid.UltraGridLayout.ListManagerUpdated(BindingManagerBase bindingManager)
at Infragistics.Win.UltraWinGrid.UltraGridLayout.ListManagerUpdated()
at Infragistics.Win.UltraWinGrid.UltraGridBase.Set_ListManager(Object newDataSource, String newDataMember)
at Infragistics.Win.UltraWinGrid.UltraGridBase.set_DataSource(Object value)
at Project_Name.frmMain.btnGenerateList_Click(Object sender, EventArgs e)