Problem: Unable to edit Geometric Network in ArcMap
After adding a Geometric Network to ArcMap, the network feature classes are not listed in the Target Layers dropdown list. Also, network features can be selected but not edited.
The coordinate system of the Data Frame in ArcMap is different from the coordinate system of the Geometric Network. Geometric Networks that are projected on-the-fly cannot be edited in ArcMap.
Solution or Workaround
Reset the Data Frame coordinate system in ArcMap to match the Geometric Network.