Bug
The Map.addLayer command fails with ValueError when attempting to add a layer created with the MakeFeatureLayer_management and MakeRasterLayer_management tools.
| Bug ID Number | BUG-000125587 |
|---|---|
| Submitted | September 26, 2019 |
| Last Modified | February 18, 2025 |
| Applies to | ArcGIS Pro |
| Version found | 2.4.1 |
| Operating System | Windows OS |
| Operating System Version | 10.0 |
| Status | As Designed |
Additional Information
The MakeFeatureLayer_management tool does not return a layer object but instead a result object. Extract the layer from the result using the appropriate index. In this case, it is [0]. The object at index 0 in the result object is the layer to add. Use the following code: temp = arcpy.MakeFeatureLayer_management(r"C:\Temp\GreatLakes\GreatLakes.gdb\GreatLakes", "TestOutput")[0] p = arcpy.mp.ArcGISProject('current') m = p.listMaps('Map')[0] m.addLayer(temp)Workaround
The object at index 0 in the result object is the layer to add Use the following code:
temp = arcpy.MakeFeatureLayer_management(r"C:\Temp\GreatLakes\GreatLakes.gdb\GreatLakes", "TestOutput")[0]
p = arcpy.mp.ArcGISProject('current')
m = p.listMaps('Map')[0]
m.addLayer(temp)
Steps to Reproduce
Bug ID: BUG-000125587
Software:
- ArcGIS Pro
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