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

# Nextflow on One Codex

> This page contains helpful information about how to run Nextflow workflows on One Codex.

## Supported Nextflow versions

We currently support the following Nextflow versions:

* 26.04.6
* 25.10.0
* 25.04.3
* 24.10.2
* 24.04.2
* 23.10.0
* 22.10.6

**Note:** Nextflow 22.04.5 has been deprecated. Existing workflows pinned to this version will continue to run, but new workflows cannot be created with it.

If your workflow requires a specific Nextflow version that is not listed here, [reach out to our team](mailto:support@onecodex.com) and let us know which version you need. We will try to add support for versions as needed.

## Debugging failed Nextflow workflows

If your workflow fails for a sample, we will show that the workflow is complete (`"complete": true`) but not successful (`"success": false`) in the json details for the workflow (accessible via `https://app.onecodex.com/api/v1/analyses/[workflow_run_UUID]`, using the unique identifier for this attempt of your workflow run).

For failed workflows, we retain the logs & output files temporarily (7 days after creation), so that you can explore the point of failure in your pipeline. You can access these files by appending `/files`to the above URL (i.e.`https://app.onecodex.com/api/v1/analyses/[workflow_run_UUID]/files`). The resulting json will list the available files as keys, and their temporary storage location (pre-signed URL) as values, so that you can download the required files.


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