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 class, except SubnetLine, must have a coded value attribute domain assigned on the Asset type field or each subtype (Asset group).
The network feature class or object table and subtype are identified at the end of the error text.
Configure the network classes with subtypes and attribute domains prior to enabling the network topology.
Learn more about setting up feature classification for network classes