I am trying to run an ODCM using arcpy.nax and I'm seeing this "Solve did not find a solution" error when running the example code below.
# Solving OD Cost Matrix...
# OD Cost Matrix solve failed.
# [[-2147200956, 'No "Destinations" found for "Location 1" in "Origins".'], [30212, 'Solve did not find a solution.'], [-2147200971, 'No solution found.']]
import arcpy
import os
# Check out the NA license or alert error
class LicenseError(Exception):
pass
if arcpy.CheckExtension("Network") == "Available":
arcpy.CheckOutExtension("Network")
else:
raise LicenseError("You need the ArcGIS Network Analyst extension license. Please contact your KP administrator.")
try:
arcpy.env.overwriteOutput = True
# Set environment variables
nds = r"path/to/StreetMapPremium/FGDB/StreetMap_Data/NorthAmerica.gdb/Routing/Routing_ND" # <path to your network dataset>
gdb = r"path/to/scratch.gdb" # <path to your working geodatabase>
in_origins = os.path.join(gdb, "in_org") # nw block group weighted centroids
in_destinations = os.path.join(gdb,"in_dest") # nw pc mob locations
out_lines = os.path.join(gdb,"od_cost_matrix_lines")
nd_travel_modes = arcpy.nax.GetTravelModes(nds)
travel_mode = nd_travel_modes["Driving Time"]
# Instantiate a solver object
odcm = arcpy.nax.OriginDestinationCostMatrix(nds)
# Set object properties
odcm.travelMode = travel_mode
odcm.timeUnits = arcpy.nax.TimeUnits.Minutes
# odcm.defaultImpedanceCutoff = 20
# odcm.defaultDestinationCount = 2
odcm.lineShapeType = arcpy.nax.LineShapeType.StraightLine
# Load inputs
odcm.load(
arcpy.nax.OriginDestinationCostMatrixInputDataType.Origins, in_origins)
odcm.load(
arcpy.nax.OriginDestinationCostMatrixInputDataType.Destinations, in_destinations)
# Solve the analysis
print("Solving OD Cost Matrix...")
result = odcm.solve()
# Export the results to a feature class
if result.solveSucceeded:
print("OD Cost Matrix solve succeeded.")
else:
print("OD Cost Matrix solve failed.")
print(result.solverMessages(arcpy.nax.MessageSeverity.All))
except Exception as e:
import sys
tb = sys.exc_info()[2]
print(f"An error occured on line {tb.tb_lineno}")
print(str(e))
# Solving OD Cost Matrix...
# OD Cost Matrix solve failed.
# [[-2147200956, 'No "Destinations" found for "Location 1" in "Origins".'], [30212, 'Solve did not find a solution.'], [-2147200971, 'No solution found.']]
The origin in question has the following coordinates: 33.492278, -117.247194
The destination in question has the following coordinates: 33.90478, -117.4693
The ODCM solve succeeds when running by hand within ArcGIS Pro, however, this approach is calling arcpy.na methods behind the scenes, instead of arcpy.nax.
arcpy.na.MakeODCostMatrixAnalysisLayer(r"/path/to/StreetMapPremium/FGDB/StreetMap_Data/NorthAmerica.gdb/Routing/Routing_ND", "OD Cost Matrix", "Driving Time", None, None, None, "LOCAL_TIME_AT_LOCATIONS", "STRAIGHT_LINES", None)
arcpy.na.AddLocations("OD Cost Matrix", "Origins", "in_org", "Name # #;TargetDestinationCount # #;CurbApproach # 0;Cutoff_Minutes # #;Cutoff_TravelTime # #;Cutoff_Miles # #;Cutoff_Kilometers # #;Cutoff_TimeAt1KPH # #;Cutoff_WalkTime # #;Cutoff_TruckMinutes # #;Cutoff_TruckTravelTime # #", "5000 Meters", None, "Routing_Streets SHAPE;Routing_Streets_Override NONE;Routing_ND_Junctions NONE", "MATCH_TO_CLOSEST", "APPEND", "NO_SNAP", "5 Meters", "EXCLUDE", None)
arcpy.na.AddLocations("OD Cost Matrix", "Destinations", "in_dest", "Name # #;CurbApproach # 0", "5000 Meters", None, "Routing_Streets SHAPE;Routing_Streets_Override NONE;Routing_ND_Junctions NONE", "MATCH_TO_CLOSEST", "CLEAR", "NO_SNAP", "5 Meters", "EXCLUDE", None)
arcpy.na.Solve("OD Cost Matrix", "SKIP", "TERMINATE", None, '')
# Start Time: Monday, October 31, 2022 9:54:53 AM
# Succeeded at Monday, October 31, 2022 9:54:54 AM (Elapsed Time: 0.81 seconds)
Can someone from Esri help me understand why the same origins/destinations are returning different results depending on whether arcpy.na or arcpy.nax methods are used? Any insight is appreciated!
