Unexpected Update Subnetwork Behavior

[EdwardBlair]

All -

I'm finding that, once dirty areas are cleaned up, that Update Subnetwork usually returns expected results.  But sometimes not.

In the example below I built a subnetwork for feeder 17FL012010 - its the gray line at the bottom.  Thing is, all that appeared is what seems to be a line graphic.  There is no new entry in the ElectricSubnetLine feature class.   I can't select the line or even perform a Pop-up on it.

The breaker (red box) has a subnetworkname assigned, but nothing else does.

Any suggestions on what might be going on would be much appreciated.

Thx,

Ed