Microsoft KB Archive/171054

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PRJ4: Can't Open MS Project 98 or Later MPX File with 9999+ Tasks

Article ID: 171054

Article Last Modified on 1/20/2007


  • Microsoft Project 2000 Standard Edition
  • Microsoft Project 98 Standard Edition
  • Microsoft Project 4.0 Standard Edition
  • Microsoft Project 4.1 Standard Edition
  • Microsoft Project 4.1a

This article was previously published under Q171054


In Microsoft Project, version 4.0 or Microsoft Project for Windows 95, versions 4.1 and 4.1a, you may not be able to open a file that was saved in Microsoft Project 98 or later in the MPX 4.0 file format.


This problem occurs because the MPX 4.0 file contains more than 9999 tasks. Microsoft Project 4.0 files can contain no more than 9999 tasks.


Microsoft has confirmed this to be a problem in the versions of Microsoft Project listed above.

Additional query words: prj2000

Keywords: kbbug kbinterop kbpending KB171054