Can't open pdf report

I set up a SS User Usage by Day report which gets delivered to my e-mail as a pdf file.  I had been able to open them.  Lately, however, I get an Adobe Reader error:  "There was an error opening this document.  The root object is missing or invalid."  I'm using Reader 9.2, which I've reinstalled.  I can open other pdfs just fine w/ Reader 9.2.  Did the report generation mechanism change somehow?

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  • Using an older WinXP system.  Yes, I can open older PDFs (just tried one from 9/9/13 and 11/4/13)).  As another test, I saved the pdf file and used raster manager to try to view it in a DGN.  Got this messdage:  An error occurred in the PDF library (Error code: 29.  Error messages: Expected a number objects) - (8074).  If ustn is using and Adobe dlls, maybe I need to remove Reader and then manually deleting anything Adobe left on the disk before reinstalling?

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