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Exception "This Excel files contains BIFF7(Excel95 or earlier file format) records" when reading XLS file in .NET

Exception occurs after Aspose.Cells opens document

Aspose.Cells.CellsException: This Excel files contains
BIFF7(Excel95 or earlier file format) records.<o:p></o:p>

at Aspose.Cells.RW..( )

at Aspose.Cells.Workbook.Open(Stream stream, FileFormatType type)

at Aspose.Cells.Workbook.Open(String fileName)


Thank you for considering Aspose.

I checked your provided files and they are of BIFF7 (Excel 95) format. As Aspose.Cells supports BIFF8 or greater formats (Excel 97 - Excel 2007). I think you may try the following steps:

  • Open your template .xls file in MS Excel (e.g..,Ms Excel 2003 or 2007).
  • Save the file As "Microsoft Office Excel Workbook".
  • Now you can use Aspose.Cells to open/manipulate the file for your requirements.

Thank You & Best Regards,

Thanks a lot for support !


We recommend you to kindly try upgrading to and use latest version of the product which includes support for older BIFF7 (Excel 95/5.0 - 2003 Workbook) formats with enhancements now:

Also, see the document for supported input and output file formats by Aspose.Cells: