When creating a geometric network from existing feature classes, there is a limit to the number of features, specifically polyline features, that can be contained within the feature classes.
Depending on the schema of the geometric network, the limit is anywhere from 10-20 million polyline features. This number varies depending on the following factors:
• the number of simple vs. complex edge feature classes
• the geometry of the features in any complex edge feature class
• the number of weights assigned to the geometric network
This is due to a known limit in the geometric network creation process.
Since these workarounds involve features circumventing the geometric network creation process, it is the responsibility of the user to ensure that the features have been integrated correctly prior to implementing either workaround. Before implementing either of these workarounds, contact Esri Support Services to ensure the workaround is applicable to the situation. See Related Information for a link to Esri Support Services.