Update ArcPy version to avoid AttributeError: 'module' object has no attribute 'GetCl

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This is probably the answer to my previous question: List Elements or Datasets of a given Layer.

The version of arcpy that I am using does not include GetNAClassNames

naClasses = arcpy.na.GetNAClassNames(serviceAreaLayer)

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AttributeError: 'module' object has no attribute 'GetClassNames'

According to this help topic, GetNAClassNames is in ArcGIS 10.1. Why is it not in my version?



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