First, thanks for reading this thread. Due to ESRI documentation, when the data changes the network dataset must be rebuilt. In a small net, it is no problem because this process takes a couple of seconds/minutes. But in my case, with a huge net (1/2 million square kilometers of roads/streets), it takes several hours. In order to minimize this problem, the net has been divided into subnetwork datasets. So, when we have to rebuild a net, we rebuild the subnetwork and not the entire net. And heres come the questions*: 1) Is there any way to join the subnetwork datasets into unique network? 2) Is there any other way to minimize the rebuild of a huge net? Thank you in advance. Best regards. (*) We are using ArcGIS 9.3.1
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