Debugging network analyst solve error 030024

I’m trying to build service areas for a low-voltage utility network, but am having trouble solving the network analysis. Here is the code to build the service area:

Treatment_SA = arcpy.na.MakeServiceAreaLayer (network, district+"_Treatment_SA", "Length", "TRAVEL_FROM", "200" , "DETAILED_POLYS", "NO_MERGE" , "DISKS", "NO_LINES" , "NON_OVERLAP", "NO_SPLIT", Feeders, "", "", "", "TRIM_POLYS", distance_from_line)
Treatment_SA = Treatment_SA.getOutput(0)


#Load Elements
arcpy.na.AddLocations (Treatment_SA, "Facilities", Injection_TX, "", "25 Meters")
arcpy.na.AddLocations (Treatment_SA, "Polygon Barriers", Existing_TX_Polygons, "", "25 Meters")

#Solve
arcpy.na.Solve(Treatment_SA,"SKIP")

I’m not too worried about errors in the code since it has run successfully with other data, but I’m including in this post in case it is helpful. When I run this code, I receive error 030024:

Solve returned a failure. No edges were traversed. Failed to execute (Solve).

How can I find out more about what is causing this error?