PROBLEM
When attempting to create a service area in Network Analyst or execute a solve operation, a generic error is returned.
For example:
"Error: There is insufficient available memory to make allocation polygons."
The issue is caused by insufficient virtual memory allocated during the service area creation or during the solve process.
Note: Ensure the network dataset has a hierarchy attribute. For more information about analysis using hierarchies, refer to the following document, ArcGIS Help: Adding a hierarchy to a network dataset. When hierarchy is used, network elements are assigned with rank or order. For example, a street network may be ranked as having at least three classes, such as primary, secondary, or local. These classes can be used on the source features to create a hierarchy attribute on the network dataset. Since higher-order roads are simpler and more predictable to traverse on as opposed to lower-order roads, the solver tends to opt for higher order edges analysis. Due to this calculation, in general, hierarchy takes shorter time to complete an analysis carried out on a large network. For more information, refer to the following document, ArcGIS Help: About network analysis with hierarchy.
Article ID: 000012842
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