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Problem: Opening a PDF with Adobe Reader from within the ArcGIS Developer Help System on Windows 7 gives an error

Description

Users encounter an error message or empty dialog box from Adobe Reader 9.1.1 and earlier when attempting to view PDF files within ArcGIS Developer Help System on Windows 7 operating systems.

Cause

Windows 7 has compatibility issues with Adobe Reader 9.1.1 and earlier when viewing PDF files in Web browsers.

Solution or Workaround

Go to the Adobe Reader Web site and update Adobe Reader to 9.1.2 or higher. Opening a PDF within the ArcGIS Developer Help System no longer displays an error.