Utility Network supports subnetworks fed from multiple subnetwork controllers [SNC's] assuming these all have the same subnetwork name assigned.
In case of multiple SNC's feeding the same area, features being part of such subnetwork will have an attribute listing all the SNC controller names feeding the area.
Yet, if if more SNC's feed the same area, and these SNC's have differing subnetwork names the subnetwork (line feature) is not generated - and error is generated only.
When this happens, a user will need to debug the cause. That is, most likely find the switching device that should have been opened to serve as a tie point. This task would be quite a lot easier, if the user had the subnetwork line feature to look at in the map.
Assuming that ArcGIS does all the needed tracing to find the inconsistent SNC subnetwork names, it would be really nice, if UN actually returned the feature representing the illegal subnetwork line. Why not return a subnetwork line feature flagged as "Illegally fed from multiple SNC's with inconsistent subnetwork names."
Such improvement would offer a lot of value also during daily operation. Esri tends to show examples where a portion of the grid is temporarily de-energized (opening a switching device) to then be energized again (closing another switching device (a in effect often feeding from other substation). That is not how any DSO would do. You would not de-energize the grid, rather feed it from both sides temporarily to then shortly after to open a switch to once again make feeding 'correct'. It would be very useful to show the temporarily multi-fed part of the grid in a special color making everyone aware that a temporary situation exists.
