Azure Machine Learning pipelines fail due to missing space in optional component arguments when rendering runtime expression

[donin1129]

Describe the bug

We try to follow the recommendation of using optional inputs as described here:
https://learn.microsoft.com/en-us/azure/machine-learning/how-to-manage-inputs-outputs-pipeline?view=azureml-api-2&tabs=cli#define-optional-inputs
But our pipeline throw error unrecognized arguments.

Related command

az ml component create -f XXX.yaml
az ml job create -f XXX.yaml

Errors

In our command component, we added

And we got following error from our pipeline job

Error: train.py: error: unrecognized arguments: --max_epocs5

Issue script & Debug output

There is no error when using the cli tool directly.
The error happens when our pipeline in Azure Machine Learning runs.

Expected behavior

No error should exist and optional parameter should be provided correctly.

Environment Summary

azure-cli 2.68.0 *

core 2.68.0 *
telemetry 1.1.0

Extensions:
ml 2.35.0

Dependencies:
msal 1.31.1
azure-mgmt-resource 23.1.1

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Extensions directory 'C:\Users\z005230u.azure\cliextensions'

Python (Windows) 3.12.8 (tags/v3.12.8:2dc476b, Dec 3 2024, 19:30:04) [MSC v.1942 64 bit (AMD64)]

Additional context

No response

[azure-client-tools-bot-prd]

Hi @donin1129,

2.68.0 is not the latest Azure CLI(2.69.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.

[microsoft-github-policy-service]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @azureml-github.