I am working on simulating resource deployments within arcpy network analyst. I have individual incidents stored in a file database (they have to remain single because later on the script must do a check to ensure there is a resource to deploy. My problem is with the iteration. The first closest facility analysis works but then the script fails before completing the next one. It returns

arcgisscripting.ExecuteError: A python error occurred.
Failed to execute (FindClosestFacilities). 

This is my code snippet below

import arcpy
import time
arcpy.env.workspace = r"c:\Simulation\incidents.gdb"
arcpy.env.overwriteOutput = True
start = time.clock()
featureclasses = arcpy.ListFeatureClasses()

print featureclasses

for fc in featureclasses:       
    arcpy.env.workspace = r"c:\Simulation\incidents.gdb"
    arcpy.env.overwriteOutput = True
    inNetworkDataset = r"c:\Simulation\tempFGDB.gdb\deccan_street\deccan_street_ND"
    inIncidents = fc
    inFacilities = r"c:|Simulation\proposed_csl.shp"
    outGeodatabase = r"c:\Simulation\NA_outputs.gdb"
    outRoutes = "Routes"
    outDirections ="Directions"
    outClosestFacilities = "ClosestFacilities"
    measurement_units = "Minutes"
    with arcpy.da.SearchCursor(fc,("DATE_TIME", "OBJECTID")) as cursor:
        for row in cursor:
            vALUE = str(row[1])

    # Run FindClosestFacilities. Choose to find only the closest facility.
    arcpy.na.FindClosestFacilities(fc, inFacilities, measurement_units, inNetworkDataset, outGeodatabase, outRoutes + "_" + vALUE, outDirections + "_" + vALUE, outClosestFacilities + "_" + vALUE, Number_of_Facilities_to_Find=1)

print "Script completed successfully"

elapsed = (time.clock() - start)
print("Execution time: " + str(elapsed))

closed as unclear what you're asking by PolyGeo Jan 11 '17 at 7:44

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  • What purpose does the search cursor solve? VALUE never changes since you are always getting the last OID each iteration of the outer for loop. – Paul Nov 29 '16 at 17:46
  • To identify outputs, I don't know how to call specific field values from the feature class list directly and pass it to append to output names – Bornterra Nov 29 '16 at 18:50
  • 2
    When you define InFacilities it is using the wrong slash in path. – Hornbydd Nov 30 '16 at 8:58
  • 1
    Yep, InFacilites. Also, consider using an error handler in your scripts. If the script fails the error handler will return more detailed information about why it failed- both from the arcpy side of things and the Python/syntax side . desktop.arcgis.com/en/arcmap/10.3/analyze/python/… – GBG Nov 30 '16 at 16:25
  • The InFacilities slash changed somehow when I copied and pasted my code. However even with that fixed and the error handler I get the same generic errors. – Bornterra Nov 30 '16 at 18:45