Hi Benoit,

I think you should be able to achieve what you want with something like this:

        private void ultraGrid1_Error(object sender, Infragistics.Win.UltraWinGrid.ErrorEventArgs e)
        {
            if (e.ErrorType == ErrorType.MultiCellOperation)
            {
                if (e.MultiCellOperationErrorInfo.Operation == MultiCellOperation.Paste &&
                    e.MultiCellOperationErrorInfo.CanContinueWithRemainingCells)
                {
                    e.MultiCellOperationErrorInfo.Action = MultiCellOperationErrorInfo.ErrorAction.Continue;
                    e.Cancel = true;
                }
            }
        }