Since upgrading from NetAdvantage 3.3 to NetAdvantage for .NET Vol 1 for CLR 1.x my windows application keeps producing the following unhandled exception:

System.Exception: Internal error: can't convert to DestinationValue.
   at Infragistics.Win.EmbeddableEditorBase.GetDataFilteredDestinationValue(ConversionDirection direction, EmbeddableEditorOwnerBase owner, Object ownerContext)
   at Infragistics.Win.CheckEditor.get_Value()
   at Infragistics.Win.CheckEditor.get_CurrentEditText()
   at Infragistics.Win.UltraWinGrid.UltraGridCell.CommitEditValue(Boolean& stayInEdit, Boolean fireDataError, Boolean forceDontThrowException, Boolean dontStoreInUndoHistory)
   at Infragistics.Win.UltraWinGrid.UltraGridCell.CommitEditValue(Boolean& stayInEdit, Boolean fireDataError, Boolean forceDontThrowException)
   at Infragistics.Win.UltraWinGrid.UltraGridCell.CommitEditValue(Boolean& stayInEdit, Boolean fireDataError)
   at Infragistics.Win.UltraWinGrid.UltraGridLayout.OnEditorBeforeExitEditMode(Object sender, BeforeExitEditModeEventArgs e)
   at Infragistics.Win.EmbeddableEditorBase.OnBeforeExitEditMode(Boolean& cancel, Boolean forceExit, Boolean applyChanges)
   at Infragistics.Win.CheckEditor.OnBeforeExitEditMode(Boolean& cancel, Boolean forceExit, Boolean applyChanges)
   at Infragistics.Win.EmbeddableEditorBase.ExitEditMode(Boolean forceExit, Boolean applyChanges)
   at Infragistics.Win.UltraWinGrid.UltraGridCell.ExitEditMode(Boolean cancellingEditOperation, Boolean forceExit)
   at Infragistics.Win.UltraWinGrid.UltraGridCell.ExitEditMode()
   at Infragistics.Win.UltraWinGrid.UltraGrid.ClearActiveCell(Boolean invalidate, Boolean shutdown)
   at Infragistics.Win.UltraWinGrid.UltraGrid.OnActiveRowCleared(Boolean update)
   at Infragistics.Win.UltraWinGrid.UltraGridBase.SetActiveRow(UltraGridRow row, Boolean scrollIntoView)
   at Infragistics.Win.UltraWinGrid.UltraGridCell.Activate()
   at Infragistics.Win.UltraWinGrid.UltraGridCell.SetFocusAndActivate(Boolean byMouse, Boolean enterEditMode, Boolean byTabKey)
   at Infragistics.Win.UltraWinGrid.UltraGridCell.SetFocusAndActivate(Boolean byMouse, Boolean enterEditMode)
   at Infragistics.Win.UltraWinGrid.CellUIElementBase.OnEmbeddableElementMouseDown(Object sender, EmbeddableMouseDownEventArgs e)
   at Infragistics.Win.UltraWinGrid.GridEmbeddableEditorOwnerInfoBase.OnEditorMouseDown(EmbeddableUIElementBase embeddableElem, EmbeddableMouseDownEventArgs e)
   at Infragistics.Win.EmbeddableUIElementBase.RaiseMouseDownEvent(UIElement sender, MouseEventArgs mouseArgs, Boolean isButton)
   at Infragistics.Win.CheckEditorCheckBoxUIElement.OnMouseDown(MouseEventArgs e, Boolean adjustableArea, UIElement& captureMouseForElement)
   at Infragistics.Win.ControlUIElementBase.ProcessMouseDownHelper(Object sender, MouseEventArgs e)
   at Infragistics.Win.ControlUIElementBase.ProcessMouseDown(Object sender, MouseEventArgs e)
   at Infragistics.Win.Utilities.ProcessEvent(Control control, ProcessEvent eventToProcess, EventArgs e)
   at Infragistics.Win.UltraControlBase.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.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Does anyone have any ideas as to how i can resolve this?

Thanks!