Using arcpy I can make a service area layer in Network Analyst like this:
outSAResultObject = arcpy.na.MakeServiceAreaLayer(inNetworkDataset, outNALayerName, impedanceAttribute, "TRAVEL_FROM", "10", "DETAILED_POLYS", "NO_MERGE", hierarchy = "NO_HIERARCHY")
However, where is this created? in "inNetworkDataset" and the GDB associated, but it's not visible in the GDB or ArcMap. It is there somewhere: when I try to run the script again it says
Failed to execute. Parameters are not valid. ERROR 030036: A layer with this name exists. Failed to execute (MakeServiceAreaLayer).
I change the outNALayerName and it works. I would mainly like to know how to remove or delete old service areas, but am also vaguely curious if it is possible to access them using ArcMap or Catalog