---
title: "'One control point is misaligned' error message troubleshooting"
slug: "one-control-point-is-misaligned-error-message-troubleshooting"
description: "What to do if while processing a specific dataset  has completed but the warning message One control point is misaligned is displayed."
tags: ["Control Point Misalignment", "Quality Map Issues", "segfault slam run", "SLAM break", "SLAM Breaks", "SLAM drift", "SLAM Error", "Troubleshooting"]
updated: 2025-10-28T08:51:07Z
published: 2025-10-28T08:51:07Z
canonical: "knowledge.navvis.com/one-control-point-is-misaligned-error-message-troubleshooting"
---

> ## 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.

# 'One control point is misaligned' error message troubleshooting

## Issue description

Processing for a specific Dataset has completed but the warning message **One control point is misaligned** is displayed.

![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/one-control-point-is-misaligned-error-message-troubleshooting-image-hctfbjsr.png)

Possible cause for this is one control point does not match the scanned data and/or other control points. There may be several reasons for this:

- The control point was not measured correctly with the total station (offset in low cm range).
- When using control point stickers, a sticker may have been misplaced before scanning.
- The device slipped while scanning this control point.
- There is a typo in the control point location in the anchor file.
- A SLAM break occurred during the scanning.

## Troubleshooting procedure

1. Click **View Control Point Configuration**to check the corresponding control point.
2. Click on the quality map and check for extensive drifts or SLAM breaks. You can identify SLAM breaks through double walls, shortened or extended walls/corridors, unnaturally tilted rooms or a jump in the trajectory.
3. If there is no obvious SLAM break, correct or exclude, the misaligned control point and rerun processing, refer to [How to exclude some control points from processing](/v1/docs/excluding-control-points-from-processing).
4. In case of a SLAM break, contact NavVis support and attach the following data to help us investigate the problem:
  - The [quality map](/v1/docs/quality-map): right-click on the quality map and click **Save image as**.
  - The [processing logs](/v1/docs/activity-log).
  - The [control point optimization logs](/v1/docs/control-point-logs).

---

### FAQ

#### What does the warning message 'One control point is misaligned' indicate?

It indicates that one control point does not match the scanned data or other control points.

#### What are some possible causes for a misaligned control point?

Possible causes include incorrect measurement with the total station, misplaced control point stickers, device slippage during scanning, typos in the control point location, or a SLAM break.

#### How can I check the control point configuration?

You can check the control point configuration by clicking on 'View Control Point Configuration'.

#### What should I look for in the quality map to identify issues?

Look for extensive drifts or SLAM breaks, which can be identified by double walls, shortened or extended walls/corridors, unnaturally tilted rooms, or jumps in the trajectory.

#### What should I do if I find a misaligned control point?

You should correct or exclude the misaligned control point and then rerun the processing.

#### What steps should I take if there is a SLAM break?

Contact NavVis support and attach the quality map, processing logs, and control point optimization logs to help investigate the problem.

A dataset is a piece of a site, the result of a continuous recording with a NavVis mapping device or the result of an imported point cloud. Datasets can contain panoramic images and point clouds.

Simultaneous Localization And Mapping