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ArcGISFileHelperLibEx.dll for  ArcGIS 10.0

Question asked by charlesfox123 on Apr 29, 2015


I recently installed ArcGIS 10.3 but had to uninstall and re install ArcGIS 10.0 with sp5. The install went fine but now I cannot open any of my MXDs. It gives the error: "The program can't start because ArcGISFileHelperLibEx.dll is missing from your computer. Try reinstalling the program to fix this problem". How do I accomplish this?