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Try each of the following steps in order until the issue is resolved:

  1. Search for and manually register the OWC.DLL and OWC10.DLL files.
  2. Replace the older version of the OWC10.dll file with a newer version
    1. Download version 10.0.6765.0 of the OWC10.dll file from Microsoft's website.
    2. Replace the old OWC10.dll file with the downloaded file.
    3. Manually register the new OWC10.dll file.
  3. Download the Office XP web components from Microsoft.
    Note: For more information, refer to our system requirements for the latest compatibility information.
  4. Run the Windows and Microsoft Office Online Automatic Updates. For instructions, refer to Microsoft's article:
  5. Remove MS Project Service Pack 1 or completely remove MS Project from the workstations experiencing this problem.
  6. Unregister the msolap90.dll file and register the msolap80.dll file:
    1. Unregister msolap90.dll, located at C:\Program Files\Common Files\System\Ole DB
    2. Register msolap80.dll, located at C:\Program Files\Common Files\System\Ole DB