---
title: "Troubleshooting Custom Map Upload Errors"
slug: "troubleshooting-error-failed-upload-when-uploading-customized-floor-maps"
tags: ["Troubleshooting"]
updated: 2025-10-29T12:29:25Z
published: 2025-10-29T12:29:25Z
canonical: "knowledge.navvis.com/troubleshooting-error-failed-upload-when-uploading-customized-floor-maps"
---

> ## 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.

# Troubleshooting Custom Map Upload Errors

### Issue description

When trying to replace the generated maps from NavVis IVION with a customized version, the following error appears: “Failed upload: malformed input off: X length: X”

![](https://cdn.document360.io/bf174766-fa1a-4fe1-a4d7-b1db1e7cb996/Images/Documentation/troubleshooting-error-failed-upload-when-uploading-customized-floor-maps-image-fj0eavpl.png)

## Troubleshooting procedure

There was an issue during folder compression when NavVis IVION expects a .zip-file to be uploaded. In particular cases, a (German) umlaut in the folder names can corrupt the .zip-file. When trying to upload the .zip, the error above is displayed.

### Check the following

- The folder structure of the originally downloaded maps must be exactly the same when uploading customized maps.
- The .png images (maps) cannot be altered in size, orientation or color depth → otherwise NavVis IVION will reject them.
- Unzip the .Zip-File and check for corrupted characters in the file/folder names → if so, rename the building and Bundle inside NavVis IVION and make sure that no umlaut is used in both names.
- The instance is complete, all buildings and floors are named.
- None of the buildings have duplicate names.
- None of the floors within a building have duplicate names.
- You have 2D generated Maps for the Bundle(s) where you want to customize the maps.

Bundles, specifically referred to as Alignment Bundles in NavVis IVION, are collections of related datasets that have been grouped together after being aligned. The primary purpose of creating an alignment bundle is to save the relative locations of these datasets to each other, enabling coordinated management and use within the system