Export Topology Errors (Data Management)


Exports the errors and exceptions from a geodatabase topology to the target geodatabase. All information associated with the errors and exceptions, such as the features referenced by the error or exception, is exported. Once the errors and exceptions are exported, the feature classes can be accessed using any license level of ArcGIS. The feature classes can be used with the Select Layer By Location tool and can be shared with other users who do not have access to the topology.


  • The default output location is the location of the specified topology.

  • The output of the tool consists of three feature classes, one for each supported geometry type of topology error: points, lines, and polygons. The names of each feature class are created by combining a user-defined base name appended with either PointsErrors, LineErrors, or PolygonErrors.

  • The default Base Name parameter value for the three output feature classes is the name of the specified topology.

  • Three output feature classes are always created, even if there are no topology errors of each geometry type. Use the Get Count tool to determine if any of the feature classes are empty.

  • The field collection of the output feature classes is fixed and can only be modified after exporting. Along with the standard geodatabase feature class fields (ObjectID, Shape, and optional shape length and area fields), the following fields are included and contain information regarding each topology error:

    Field nameTypeDescription



    Origin Class Name



    Origin Feature's Object ID



    Destination Class Name



    Destination Feature's Object ID



    Description of the rule that was violated, obtained from the esriTopologyRuleType enumeration



    User-friendly description of the rule that was violated. This description is the same as one provided in the Topology Error Inspector.



    Indicates if this error is an exception. A value of 1 identifies the error as an exception.

  • Starting at ArcGIS Pro 2.6, the input topology layer can be from a topology service if the service is published with ArcGIS Enterprise 10.8.1 or later. If the layer has been added to the Contents pane, you can drag the layer to the Input Topology parameter, or you can enter the URL of the topology layer feature service, for example, https://myserver.mydomain.com/server/rest/services/myTopoService/FeatureServer/0.


ExportTopologyErrors(in_topology, out_path, out_basename)
ParameterExplanationData Type

The topology from which the errors will be exported.

Topology Layer

The output workspace in which the feature classes will be created.

Feature Dataset; Workspace

The name to prefix to each output feature class. This allows you to specify unique output names when running multiple exports to the same workspace. The default is the topology name.


Derived Output

NameExplanationData Type

Point topology errors.

Feature Class

Polyline topology errors.

Feature Class

Polygon topology errors.

Feature Class

Code sample

ExportTopologyErrors example (stand-alone script)

The following stand-alone script demonstrates how to use the ExportTopologyErrors function.

# Set the necessary product code
import arceditor

# Import arcpy module
import arcpy

# Local variables:
co_topo_FD_Topology = "C:/Testing/topology.gdb/my_topo_FD/my_topo_FD_Topology"

# Process: Export Topology Errors


This tool does not use any geoprocessing environments.

Licensing information

  • Basic: Yes
  • Standard: Yes
  • Advanced: Yes

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