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The problem turns out to be the formatting of the exported xml, which in turn is due to some stray characters in various mpp fields. When I open the xml in Excel it gives me the offset of the offending character, then I open the xml in HxD, go to the offset, and fix the xml. There are numerous errors, which I have to identify and fix one at a time. The file is enormous, so this is going to take a while, but I think it will ultimately work. I can also use the results of this exercise to go back and fix the mpp. Thanks for your comments.
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The problem turns out to be the formatting of the exported xml, which in turn is due to some stray characters in various mpp fields. When I open the xml in Excel it gives me the offset of the offending character, then I open the xml in HxD, go to the offset, and fix the xml. There are numerous errors, which I have to identify and fix one at a time. The file is enormous, so this is going to take a while, but I think it will ultimately work. I can also use the results of this exercise to go back and fix the mpp. Thanks for your comments.

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I exported a large (4,000 tasks) mpp to xml and when I attempt to open it with Project I get the error &quot;An unexpected error occurred... The file may be damaged.&quot; I tried exporting it several times but get the same error each time. I don't see anything obvious in the xml, but it is huge and something could be lurking someplace that's not apparent. Does anybody have any ideas?
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I exported a large (4,000 tasks) mpp to xml and when I attempt to open it with Project I get the error "An unexpected error occurred... The file may be damaged." I tried exporting it several times but get the same error each time. I don't see anything obvious in the xml, but it is huge and something could be lurking someplace that's not apparent. Does anybody have any ideas?

MSProject - error opening exported XML file

Project management software has the capacity to help plan, organize, and manage resource tools and develop resource estimates. Depending on the sophistication of the software, it can manage estimation and planning, scheduling, cost control and budget management, resource allocation, collaboration software, communication, decision-making, quality management and documentation or administration systems.