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ArcGIS 10.3 contains a new feature which allows map documents to be loaded off a temporary local copy rather than read over the network. This can speed up the loading of map documents in some network configurations where multiple ArcMap instances are opening the same document. The instructions provided describe how to enable this feature.
Warning: Applications that rely on the document path see a temporary file path reported by ArcObjects APIs when this feature is enabled.
There are a number of ways to update the computer registry. Two methods are presented below. The first method is the least complicated.
Warning: The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary. Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.
Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\ESRI\Desktop10.3\ArcMap\Settings] "CopyMXDLocalOnOpen"=dword:00000001
Alternatively, registry changes can be made manually.
For Version 10.3: