Using this "ml_client_workspace.components.download" is not able to download the components code

Question

Using this "ml_client_workspace.components.download" is not able to download the components code

Nikhil Pothineni 55

If I use this method but this is not working properly if I upload a component now it wont be able to download the codes and it gives error
ValueError: Invalid code path: None
even though the data is in workspace blob store

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Answer 1

Pavankumar Purilla 8,335 Microsoft External Staff Moderator

Hi Nikhil Pothineni,

The error ValueError: Invalid code path: None when using ml_client_workspace.components.download typically occurs if the component was uploaded without a properly defined code: field in the component YAML or if the code directory was not registered correctly at the time of upload. Although the component may appear to be uploaded successfully and the related files may exist in the workspace blob store, the download operation depends on the component metadata to include a valid code path. If this metadata is missing or set to None, the SDK cannot resolve the location of the code, resulting in the error. To resolve this, please ensure that the code: field is correctly specified in the component YAML and points to a valid local directory during upload. We recommend re-uploading the component with the appropriate code path. Once done, you should be able to successfully use the download() method.
If the issue persists, please let us know the steps you followed and the region where your workspace is hosted, so we can assist you further.

Nikhil Pothineni 55 Reputation points

2025-06-18T04:00:27.3666667+00:00
Hi @Pavankumar Purilla ,

Thanks for answering

I am keeping my code path like code: ./, it was working before only recently this error is coming, this method still works for my previous upload versions but if I upload a new one it won't work.

Edit:- I found the error actually what is happening is when I register the component in workspace earlier the assets were getting saved in https://AMLdefaultworkspace.blob.core.windows.net/7ed70b4a-bc33-4408-adda-1b913539726f-oiwg9khgl1js0sj0gi7jd1pf3w/train/register.py

which was working fine.

Then now if I register any component in workspace the assets are getting saved in https://AMLdefaultworkspace.blob.core.windows.net/azureml-blobstore-7ed70b4a-bc33-4408-adda-1b913539726f/designer/1750152852259/81d73f1c-bb4b-4fb8-a5d2-591349f02259/train_ensemble/ensemble_training_script.py

The difference is azureml-blobstore-7ed70b4a-bc33-4408-adda-1b913539726f folder due to which the download method is unable to get code path

My problem can be solved if I can get this URI from code somehow so

Is there anyway of getting this URI from code?

code: ./
Pavankumar Purilla 8,335 Reputation points Microsoft External Staff Moderator

2025-06-19T08:42:51.09+00:00

Hi Nikhil Pothineni,

Thank you for the additional context. We understand that your previous component uploads are working as expected when using ml_client_workspace.components.download, but newly uploaded components are resulting in a ValueError: Invalid code path: None. This behavior is likely due to a recent change in how the Azure ML SDK or backend service handles the code: field during component registration. Although the code appears in the Azure ML Studio and can be downloaded manually the SDK relies on the component metadata to contain a valid code path. If this metadata is missing or not properly set during upload, the download method will fail. You can attempt to access the code URI programmatically via component.code, but if it returns None, the artifact is not available for SDK-based download. We recommend ensuring that the code: field in your YAML is set to a valid local directory (code: ./) and re-uploading the component.
Pavankumar Purilla 8,335 Reputation points Microsoft External Staff Moderator

2025-06-20T01:58:08.57+00:00

Hi Nikhil Pothineni,
Did you get any chance to check the response. Thank you!
Nikhil Pothineni 55 Reputation points

2025-06-20T06:36:58.13+00:00

Hi @Pavankumar Purilla when I run component.code it is not None (/subscriptions/868e00e6-7afe-4ce2-b92c-1ec5517b91a2/resourceGroups/rg-aml-workspace/providers/Microsoft.MachineLearningServices/workspaces/mlw-test-registry/codes/a3d60144-a277-4ca0-8b0d-54151b09b237/versions/1)I re uploaded with still the issue is there. Is it because of the different path issue that I mentioned earlier that the method is unable to resolve
Pavankumar Purilla 8,335 Reputation points Microsoft External Staff Moderator

2025-06-23T06:53:08.2933333+00:00

Hi Nikhil Pothineni,
Thank you for sharing the additional details. Since component.code is returning a valid resource ID, it confirms that the code has been properly registered as a Code asset in Azure Machine Learning. The reason you are still seeing the ValueError: Invalid code path: None when using ml_client_workspace.components.download() is likely because this method is designed to work when the code is directly attached to the component as an inline artifact or blob URI, but in your case, the code is stored separately as a registered Code asset. As a result, the download method is unable to resolve the ARM resource ID of the code into a direct blob location for download. To work around this, you can retrieve and download the code asset directly using ml_client.codes.get() with the name and version from the component.code path. This approach allows you to successfully download the code that is associated with your component.
Nikhil Pothineni 55 Reputation points

2025-06-26T06:13:40.2933333+00:00

Hi @Pavankumar Purilla thanks I will try this and let you know

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Using this "ml_client_workspace.components.download" is not able to download the components code

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