Solve (Network Analyst)
Release 9.3 Last modified December 23, 2008	Print all topics in : "Tools"

Performs the analysis appropriate to the network analysis layer on which it is executed

Usage tips

• Be sure to specify all the parameters necessary to perform the analysis before running Solve.

• The following environment setting affects this tool: workspace.

• If the input network analysis layer parameter is a vehicle routing problem layer, ignore invalid locations parameter is disabled as the vehicle routing problem solver requires that the invalid locations are not ignored.

Command line syntax
An overview of the Command Line window
Solve_na <in_network_analysis_layer> {SKIP | HALT}

Parameter	Explanation	Data Type
<in_network_analysis_layer>	The network analysis layer on which analysis will be computed.	Network Analyst Layer
{SKIP | HALT}	Invalid stops are those that cannot be reached by a solve. These occur when the stops are not near an edge or fall on a restricted edge. SKIP — Solve even if there are some locations, such as stops, facilities, incidents, origins, or destinations, that are not valid. This is the default. HALT — Do not solve if there are invalid stops. The user can then correct these and rerun the analysis. If the input network analysis layer parameter is a vehicle routing problem layer, the solve tool will always use the HALT option as the vehicle routing problem solver requires that the invalid locations are not ignored.	Boolean

Data types for geoprocessing tool parameters

Command line example

Solve MyNetworkAnalysisLayer HALT

Scripting syntax
About getting started with writing geoprocessing scripts
Solve_na (in_network_analysis_layer, ignore_invalids)

Parameter	Explanation	Data Type
in_network_analysis_layer (Required)	The network analysis layer on which analysis will be computed.	Network Analyst Layer
ignore_invalids (Optional)	Invalid stops are those that cannot be reached by a solve. These occur when the stops are not near an edge or fall on a restricted edge. SKIP — Solve even if there are some locations, such as stops, facilities, incidents, origins, or destinations, that are not valid. This is the default. HALT — Do not solve if there are invalid stops. The user can then correct these and rerun the analysis. If the input network analysis layer parameter is a vehicle routing problem layer, the solve tool will always use the HALT option as the vehicle routing problem solver requires that the invalid locations are not ignored.	Boolean

Data types for geoprocessing tool parameters

Script example

# Solve_halt.py
# Description: Solve on a network, unless there are invalid stops
# Author: ESRI

# Create the Geoprocessor
import arcgisscripting
gp = arcgisscripting.create()

# Set the workspace
gp.workspace = "d:/workspace"

# Run the command
gp.Solve(MyNetworkAnalysisLayer, "HALT")

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