I'm trying to create a network data set from a roads file (something that has worked before), but now for some reason the option to do it is not available. What could be the problem?

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Why wouldn't the option to create one be available?


It sounds like you don't have your Network Analyst extension enabled.

From the documentation, to enable it:

  • Select Extensions from the Customize menu in ArcMap

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  • Check the box next to Network Analyst

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