ERROR
When running a Python script to create a feature class, it fails with "Error 000210: Cannot create output <value>."
User permissions have been granted to that location, the path is correct, and the data is not locked, but the script still fails.
Microsoft Security Essentials is blocking Python from using output file the location.
Other anti-virus programs/applications can also prevent the creation of the feature class.
Note:
Although other issues can cause this error, this Knowledge Base article is directed at users who have installed Microsoft Security Essentials and are encountering this issue.
Microsoft Security Essentials
Added location to Microsoft Security Essentials excluded files
Microsoft Security Essentials excluded file
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