Description
Certain configuration tasks must be completed prior to enabling the network topology for a utility network. To extend the types of assets in a domain network, a feature classification must be configured using subtypes and domains. Each network feature class, except SubnetLine, must have a coded value attribute domain assigned on the Asset type field or each subtype (Asset group).
The feature class and subtype are identified following the error text.
Solution
Configure the network feature classes with subtypes and attribute domains prior to enabling the network topology.
Learn more about how to set up feature classification for network feature classes