Failed to import model. (TypeError: can't access property "mesh", objectData is undefined)

[roberwinkler]

Describe the bug

Can not display .3mf files in viewer

To Reproduce

Steps to reproduce the behavior:

1. Install 3D Model Viewer via Nextcloud Apps page.
2. Download any .3mf ( ie. from makerworld.com)
3. Try to view downladed .3mf file
4. See error

Expected behavior

Works with .stl files!
Would expect same behaviour.

I have checked that the files are not corrupted

If I try to open files either in Fusion or any 3d Slicer Software (Bambu Studio) they open correctly and display without problems.

Yes, using <name it>.

Screenshots

Browser log

Firefox

[WARN] viewer: Some mimes were ignored because they are not enabled in the server previews config
Object { app: "viewer", uid: "someone@xxxx.at", level: 2, ignoredMimes: (4) […] }
viewerAction-nlNatCwN.chunk.mjs:5:366
OCA.Files.Settings initialized files-main.js:1:257601
OCA.Files.Sidebar initialized files-sidebar.js:1:22864
OCA.Sharing.ShareSearch initialized files_sharing-files_sharing_tab.js:1:680
OCA.Sharing.ExternalLinkActions initialized files_sharing-files_sharing_tab.js:1:1468
OCA.Sharing.ExternalShareActions initialized files_sharing-files_sharing_tab.js:1:2364
OCA.Comments.View initialized comments-comments-app.js:1:21355
[ERROR] viewer: Could not register handler
Object { app: "viewer", uid: "someone@xxxx.at", level: 2, error: "The handler doesn't have a valid component", handler: {…} }
viewerAction-nlNatCwN.chunk.mjs:5:434
Notifications permissions granted NotificationsApp-CNC27OJu.chunk.mjs:38:61514
Polling interval updated to 30000 NotificationsApp-CNC27OJu.chunk.mjs:38:60945
Started background fetcher as session_keepalive is enabled NotificationsApp-CNC27OJu.chunk.mjs:38:58149
Got notification data, restoring default polling interval. NotificationsApp-CNC27OJu.chunk.mjs:38:59900
[WARN] viewer: No files provided, skipping update
Object { app: "viewer", uid: "someone@xxxx.at", level: 2 }
viewerAction-nlNatCwN.chunk.mjs:5:366
File info for /Documents/3D Printing/Bambu Lab/P1S/Downloaded Print Project Files/IKEA365-FilaBox/FilamentAufbewahrung.3mf fetched
Object { filename: "/Documents/3D Printing/Bambu Lab/P1S/Downloaded Print Project Files/IKEA365-FilaBox/FilamentAufbewahrung.3mf", basename: "FilamentAufbewahrung.3mf", lastmod: "Tue, 02 Sep 2025 06:39:26 GMT", size: 1727484, type: "file", etag: "cb3f843a567c2f1fb465647f303c7527", mime: "model/3mf", tags: "", getcontentlength: 1727484, getcontenttype: "model/3mf", … }
viewer-main.mjs:8:13769

Installation and configuration

How the app was installed?

• Via app store.

App server configuration Parameters

• apps_path parameter is not explicitly configured/customised in config/config.php

Versions

3D Model Viewer

• Version: 0.0.15

Nextcloud

• Installation type: Docker
• Version: Nextcloud Hub 10 / (https://nextcloud.com/) / (31.0.8)
• Webserver: ?? via Docker

Desktop

• OS: Windows 11
• Browser and version: Firefox Version 142.0 (64-bit)

[LionToense]

Same Problem for me.

3D Model Viewer
Version: 0.0.15

Nextcloud
Installation type: Nextcloud AIO
Version: Nextcloud AIO v11.10.0

[kroko]

can confirm

tested with these https://github.com/3MFConsortium/3mf-samples
some loaded, some did not

Current engine is online-3d-viewer as a fast drop in to handle multiple types.

it seems that engine used has issues with it kovacsv/Online3DViewer#514 thus please approach that as a fix would trickle down to this repo, too.