[InVEST Workbench 3.17.1 Plugin Error] Pydantic ValidationError when loading external plugin 'invest_sdr_usle_c_raster'

Software Support
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1

Dear NatCap Team/Community, I am encountering an issue when attempting to install/load an external InVEST plugin using the InVEST Workbench.

1. **InVEST Workbench Version:** 3.17.1 (installed on Windows)

2. **Plugin Name:** ‘invest_sdr_usle_c_raster’

3. **Operation:** Attempting to add the plugin via the Workbench interface. The process fails immediately with a `pydantic_core.ValidationError`. The error appears to be related to the plugin’s model specification metadata, specifically a required field is missing for an output raster definition. **Full Error Message:**

Error: Error invoking remote method ‘add-plugin’: Error: Command failed: “C:/Users/User/AppData/Local/Programs/InVEST 3.17.1 Workbench/resources/micromamba” run --prefix “C:/Users/User/AppData/Roaming/invest-workbench/micromamba_envs/plugin_1764392047618” python -c “import invest_sdr_usle_c_raster; print(invest_sdr_usle_c_raster.MODEL_SPEC.model_id)” Traceback (most recent call last): File “”, line 1, in import invest_sdr_usle_c_raster; print(invest_sdr_usle_c_raster.MODEL_SPEC.model_id) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File “C:\Users\User\AppData\Roaming\invest-workbench\micromamba_envs\plugin_1764392047618\Lib\site-packages\invest_sdr_usle_c_raster_init_.py”, line 1, in from .invest_sdr_usle_c_raster import MODEL_SPEC File “C:\Users\User\AppData\Roaming\invest-workbench\micromamba_envs\plugin_1764392047618\Lib\site-packages\invest_sdr_usle_c_raster\invest_sdr_usle_c_raster.py”, line 170, in spec.SingleBandRasterOutput( ~~~~~~~~~~~~~~~~~~~~~~~~~~~^ id=“avoided_erosion.tif”, ^^^^^^^^^^^^^^^^^^^^^^^^^ …<5 lines>… units=u.metric_ton / u.hectare ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ), ^ File “C:\Users\User\AppData\Roaming\invest-workbench\micromamba_envs\plugin_1764392047618\Lib\site-packages\pydantic\main.py”, line 250, in init validated_self = self.pydantic_validator.validate_python(data, self_instance=self) pydantic_core._pydantic_core.ValidationError: 1 validation error for SingleBandRasterOutput path Field required [type=missing, input_value={‘id’: ‘avoided_erosion.t…metric_ton / hectare’)>}, input_type=dict] For further information visit Redirecting...

2

Hi @wen0522, welcome to the forum and thanks for bringing this to our attention! We have recently been making changes to the MODEL_SPEC and this plugin appears not to have been updated accordingly. We will update the plugin and get back to you.

Thanks!

3

Hi @wen0522, we have updated the plugin and it should now be compatible with InVEST 3.17.1.

4

Thank you, the installation was successful. However, why does the plugin still require uploading the Land Use and Land Cover map? Isn’t the C-factor map already available?

5

This plugin in similar to the core InVEST SDR model, however instead of inputing C factor as a per-LULC class value, you can input it as a raster. However, LULC is not only used to map C values from the biophysical table, but also used to map P values in order to calculate C*P raster. Take a look at the source code and you’ll see the function _calculate_cp, which uses the LULC raster, LULC to P value dictionary mapped from the biophysical table, and the USLE raster.