Dear Jay, You are right. When I select two points at random on the network and try to solve the route between them, more often than not, ArcGIS cannot calculate a route. The map incidentally is of the country Rwanda and I have a very detailed road network (26000+ edges) that I created and built from the road shape file. I do recall when I built it that some build errors were reported - maybe 100 or so - which related to lengths that were 'zero'. However, I thought these were too few to cause major difficulties. Is this the problem then with the network dataset? What can I do to ensure it is built correctly? Thank you. Omar
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