When using XML Import or the Extract Data and Create Replica commands on the Distributed Geodatabase toolbar, if the source features are geometric network features, the operation may fail and displays the following error message:
"Multipart polylines are not allowed for network features".
The operation is failing because of the presence of multipart polylines within the source geometric network feature classes. These features are invalid within the geometric network; therefore, they are flagged as build errors during network creation.
For more information, refer to the following link: Identifying Geometric Network Build Errors.