Thank you for the response Jay! I checked to be sure the Network Analyst Extension was checked and I downloaded the North America Major Roads file from http://www.arcgis.com/home/item.html?id=06e71cbbefab401fb99b6c2bb5139487. However, the solver is still grayed. Did I download a file that is not a network dataset? If so, can you point me to a dataset that can serve for this purpose? Thank you again for your time! Best, Lynn
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