Microsoft KB Archive/928979

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Error message when you try to open a workbook that you receive in an e-mail message for review in Excel 2007: "Excel cannot open the file"

Article ID: 928979

Article Last Modified on 10/15/2007



APPLIES TO

  • Microsoft Office Excel 2007



SYMPTOMS

When you try to open a workbook that you receive in an e-mail message for review in Microsoft Office Excel 2007, the workbook does not open. Additionally, you receive the following error message:

Excel cannot open the file 'filename.xlsx' because the file format for the file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.

To determine the unique number that is associated with the message that you receive, press CTRL+SHIFT+I. The following number appears in the lower-right corner of this message:

101590

CAUSE

This issue occurs only when you send a workbook for review. The workbook file is saved as an Excel binary workbook. However, the workbook has an .xlsx extension that is appended to the file.

WORKAROUND

To work around this issue, save the workbook as one of the following file formats before you send the workbook for review:

  • Excel Binary Workbook (*.xlsb)
  • Excel 97-2003 Workbook (*.xls)



Additional query words: excel2007 excel2k7 excel12 xl2007 xl2k7 xl12

Keywords: kberrmsg kbtshoot kbprb kbemail kbexpertisebeginner KB928979