Alexy, Thanks for the thorough response. Through trial and error, it looks like the extract and build technique works, but is extremely limiting regarding size of extracted dataset. I am working on a high spec desktop, and it keeps running out of memory even when I attempt to build a network out of Washington (as in the state, not the capitol city) after exporting the selection to shapefile format, then importing it as a feature class to a new feature dataset in a personal geodatabase. I wonder if there is a better way of building the network? One which is not so memory intensive? -Derik
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