---
title: "Input/Output Error: ERROR_NODE_NOT_RUNNING"
slug: "inputoutput-error-error-node-not-running"
description: "NavVis VLX scans failing with ERROR_NODE_NOT_RUNNING and an Input/Output error in the device logs usually point to bad sectors on the external SSD. Format the SSD, and replace it if the '[Errno 5]' error persists."
updated: 2025-09-23T12:43:53Z
published: 2025-09-23T12:43:53Z
canonical: "knowledge.navvis.com/inputoutput-error-error-node-not-running"
---

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

# Input/Output Error: ERROR_NODE_NOT_RUNNING

## Introduction

### Issue description

NavVis VLX scan fails with an “ERROR_NODE_NOT_RUNNING” message and the device logs indicates an Input/Output error message.

### Scope

NavVis VLX

## Troubleshooting procedure

1. **Download device logs**

Check the device logs to confirm an Input/Output error message. Follow these instructions to access the device logs [here](https://knowledge.navvis.com/docs/how-to-download-the-device-logs-from-a-navvis-vlx?highlight=vlx%20logs),

You might also detect a pop-up message from the device with the error message:

Backend returned error ‘[Errno 5]' Input/Output error: '/srv/data/datasets_rec/dataset_ID’'

![output_input](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/output_input.png?sv=2026-02-06&spr=https&st=2026-10-14T08%3A05%3A28Z&se=2026-10-14T09%3A05%3A28Z&sr=c&sp=r&sig=vU8F2%2FbKyvDVupRsz0bYfUZd8DjjyWHFD09jSQyanEU%3D)

1. **Examine device logs**

If an Input/Output error message is indicated in the logs, proceed. If not, contact [support@navvis.com](mailto:support@navvis.com) for further debugging.

1. **Format external SSD**

This error is most likely caused by bad sectors present in the device external SSD. Most times, formatting the SSD resolves this issue. Refer to [Formatting an SSD Card](/v1/docs/formatting-an-ssd-card).

1. **Replace external SSD if issue persists**

If the issue persists after, an SSD replacement may be required. You can always contact us for further debugging before replacing the external SSD.

---

### FAQ

#### What does the 'ERROR_NODE_NOT_RUNNING' message indicate?

It indicates that the NavVis VLX scan has failed due to an issue with the device.

#### What should I do if I see an Input/Output error message in the device logs?

You should follow the troubleshooting procedure outlined, starting with examining the device logs.

#### How can I access the device logs?

You can follow the provided instructions to download and access the device logs.

#### Is formatting the external SSD a recommended solution for the Input/Output error?

Yes, formatting the external SSD often resolves the issue caused by bad sectors.

#### What should I do if formatting the SSD does not resolve the issue?

If the issue persists, you may need to replace the external SSD or contact support for further assistance.