# Troubleshooting 'Recipe file does not exist at' errors when setting up 1.5B runs on the NovaSeq X Plus

**Background**

The NovaSeq X Series 1.5B Flow Cell Recipe Installer must be run on the NovaSeq X Plus prior to setting up a sequencing run using the 1.5B Reagent kits. If the 1.5B Recipe Installer has not been run on the instrument, this results in an error indicating the 'Recipe file does not exist' during the Recipe Validation step in the Pre-Run Checks.

![](https://761066130-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGM9W2DuBTgEXv1ClCm8H%2Fuploads%2Fgit-blob-18f5c8a1c26603e967936855dad8ca88f9feb02d%2Fimage1.png?alt=media\&token=f8c9c2db-a2be-4e39-9e22-7cd8875cc96e)

**Troubleshooting Actions**

1. No consumables are marked as used at this point and the sequencing run can be restarted after completing the following steps.
2. Contact [Illumina Tech Support](https://www.illumina.com/company/contact-us.html) to request the **NovaSeq X Series 1.5B Flow Cell Recipe Installer** file.
3. Run the **NovaSeq X Series 1.5B Flow Cell Recipe Installer** according to instructions provided by Illumina Tech Support.
4. Restart sequencing run setup using the same 1.5B Reagent Kit.

Before running the **NovaSeq X Series 1.5B Flow Cell Recipe Installer**, confirm the following:

1. An Administrator user such as **`ilmnadmin`** is accessible.
2. The NovaSeq X Series Control Software version is 1.2
   1. Do not run the **NovaSeq X Series 1.5B Flow Cell Recipe Installer**if the instrument is running control Software v1.2.2

If an Administrator user is not accessible or the instrument is running NovaSeq X Series Control Software v1.1 or below, contact [Illumina Tech Support](https://www.illumina.com/company/contact-us.html) for further assistance.

\
\
\ <br>

|                                                                                                                                                                                                                                                                                                                                                                        |
| :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
| *For any feedback or questions regarding this article (Illumina Knowledge Article #8536), contact Illumina Technical Support* [*techsupport@illumina.com*](mailto:techsupport@illumina.com?subject=Question%2FFeedback%20Regarding%20Illumina%20Knowledge%20Article%20#000008536%20-%20Instrumentation%20\&body=Dear%20Illumina%20Technical%20Support,%0D%0A%0D%0A)*.* |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://knowledge.illumina.com/instrumentation/general/instrumentation-general-troubleshooting-list/000008536.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.