# Machine Learning Extractor - Custom Model Error

**URL:** <https://forum.uipath.com/t/machine-learning-extractor-custom-model-error/410544>\
**Category:** AI Center\
**Tags:** question, mlservices, document-understanding, ai-center, activities\
**Created:** [March 28, 2022, 11:13am UTC](https://forum.uipath.com/t/machine-learning-extractor-custom-model-error/410544 "2022-03-28T11:13:08Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![supermanPunch](https://sea2.discourse-cdn.com/uipath/user_avatar/forum.uipath.com/supermanpunch/32/133652_2.png) [@supermanPunch](https://forum.uipath.com/u/supermanPunch)\
**Post date:** [March 28, 2022, 11:17am UTC](https://forum.uipath.com/t/machine-learning-extractor-custom-model-error/410544/2 "2022-03-28T11:17:27Z")

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Hi @SrenivasanKanna ,

The API Key would be the Document Understanding API Key.

The `Endpoint URL` is the URL of the ML Skill Made public.

We can go to the ML Skill, Click Modify Current Deployment and Enable Make `ML Skill Public`

> [@Error when trying to use machine learning extractor](https://forum.uipath.com/t/error-when-trying-to-use-machine-learning-extractor/405868/2):
>
> Hi @99cb964e64aac1a507ca43659 , Are you using the Document Understanding Model ? Could you Specify which Model you have used ? If Document Understanding Model was used, Then have you used Document Manager to prepare the Datasets? Also we would need to make the ML Skill Public so that we can use the generated endpoint in Machine Learning Extractor [image]

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