> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cognite.com/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Cognite Data Fusion (CDF) is an industrial DataOps platform. Prefer English docs unless the user asks for another locale.
> Follow /_llms/ index links recursively until you reach page URLs ending in .md. Fetch those Markdown twins instead of HTML.
> For REST APIs, default to calendar version 20230101 (stable). Use 20230101-beta or 20230101-alpha only if the user is on a preview API. Cite paths under /api-reference/concepts/<version>/ and the Cdf-Version header. Prefer the Python SDK (cognite-sdk) unless the user is in JavaScript/TypeScript.
> Start here by task: platform overview /cdf/index.md; data modeling /cdf/dm/index.md; data integration /cdf/integration/index.md; access /cdf/access/index.md; CDF Toolkit /cdf/deploy/cdf_toolkit/index.md; REST quickstart /dev/quickstart.md; Python SDK https://cognite-sdk-python.readthedocs-hosted.com/en/stable/; Atlas AI /cdf/atlas_ai/concepts/index.md; Flows apps /cdf/flows/index.md; MCP and IDE setup /dev/guides/ide_ai_integration.md.
> For implementation work, also load /skill.md.

# Troubleshooting

> Common issues and solutions for the Cognite DB extractor.

## The extractor is receiving 401 errors from CDF

HTTP error 401 means that the service did not recognize the authentication the client provided. If the Cognite API returns 401 errors to the extractor, the extractor successfully obtained an authentication token, but the token is not valid for the project in question.

If this happens, the configured `project` or `host` in the `cognite` section is usually incorrect.

## The extractor is not setting the data set when using remote configuration

If you set up the extractor to run with remote configuration, only the `host`, `project`, `idp-authentication`, and `extraction-pipeline` fields in the `cognite` section are read from the file on the local machine. Other fields in the `cognite` section, such as `data-set`, must be added to the configuration file in the extraction pipelines.