If you call SaveToStream on a workbook that contains at least 257 columns, the returned stream contains corrupt data. If you create a new workbook from the stream, this workbook will not contain the correct values. In ad…...Product Family cells-net Nic0 April 28, 2025, 12:15pm 1 If you call...NullReferenceExcepti simon.zhao April 28, 2025, 1:31pm 2 @Nic0 saveWorkbook...