I have Layers within a Enterprise Geodatabas I build the network and then publish it as part of a service. The edges in the network dataset need to be updated regularly. How can I update the edges in an automated workflow, but ensure that if the network build fails, it reverts back to the previous (working) network? Also, is it possible to build the network using arcpy.nax instead of arcpy.na, or is BuildNetwork only available in the old na module?