Description
Double-clicking the map document in Windows Explorer does not open it in a new ArcMap session.
Cause
This is a known issue.
Workaround
- Start Windows Explorer, browse to C:\Program Files\Common Files\ArcGIS\bin\ and double-click on ArcGISFileHandler.exe to start it.
- On the Map Options tab, select 'Open in running application'.
- Click OK to close the ArcGIS File Handler application.
- Start C:\Program Files\Common Files\ArcGIS\bin\ArcGISFileHandler.exe again.
- On the Map Options tab, select 'Open in new application'.
- Click OK to close the ArcGIS File Handler application.