## Preflight checks for dbt

URL: https://docs.atlan.com/apps/connectors/etl-tools/dbt/references/preflight-checks-for-dbt

> This checks if manifest files are present in the provided bucket and prefix.

Before [running the dbt crawler](https://docs.atlan.com/llms/connectors/dbt/crawl-dbt/llms.txt), you can run [preflight checks](https://docs.atlan.com/llms/catalog/connector-capabilities/what-are-preflight-checks/llms.txt) to perform the necessary technical validations. The following preflight check will be completed:

## dbt Core

### Manifest file check on S3

This checks if manifest files are present in the provided bucket and prefix.

✅ `Check successful` if Atlan can access the bucket and prefix containing the manifest files.

❌ `Check failed`

For example:

- If Atlan cannot access the bucket - `Manifest file Check on S3: failed With error code: AccessDenied - Access Denied`
- If Atlan can access the bucket but there are no manifest files present in the bucket - `Manifest file Check on S3: No manifest files found in the mentioned S3 Prefix`

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