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It is not possible to generate directions from a route or closest facility layer from an opened map document until solve has been executed.
In order to minimize the size of map documents, network analysis layers do not store the analysis results; only the geometry is stored. As a result, the analysis layer must be re-solved after opening the map document to have the traversal information needed to generate directions.
To generate directions after opening a map document with an analysis layer, follow the steps below: