private void ConvertExcelToText(AttachmentUnit unit, IProgress <EstimatorBaseProgress> progress)
        {
            ProgressLogTask(progress, "Convert a Excel file to a text file");
            WaitTask();

            var newpath = _excelService.ConvertToWordDocument(unit.PhisicalName);

            unit.PhisicalName = newpath;
            unit.CurrentType  = FileType.Docx;
        }