Note: The content of this article pertains only to ArcGIS versions 9.x. Later versions of ArcGIS may contain different functionality, as well as different names and locations for menus, commands and geoprocessing tools.
When attempting to install a service pack for ArcGIS Desktop, the following error is encountered:
Error: This patch package could not be opened. Contact the application vendor to verify that this is a valid Windows Installer patch package.
This error is caused by one or more system conflicts.
Follow the steps below to resolve the error.
msiexec.exe /p C:\ArcGISDesktop9(#)sp(#).msp
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