Win 11 Blender 4.5.3 LTS Python: TypeError: Import3MF

[liltorchic]

Fresh install of latest blender version from Steam. Blender 4.5.3 LTS

Downloaded Blender3mfFormat 1.0.2 and installed in addon menu.

File->import -> 3mf

"Python: TypeError: Import3MF.init() takes 1 positional argument but 2 were given"

[ivesdebruycker]

This worked for me (for 4.5.3 LTS):
#77 (comment)

[nreyes-dev]

A designer friend of mine reported this issue to me (he knows I'm a developer and I used to work on blender plugins, I've never contributed to this plugin though). So I went to check here and saw this issue open. Just wanted to chime in and say it happened to my friend so this is certainly real. I might take a look later and see if I can fix it

[tcdoeh]

Hello! I would like to help.
I am on blender 4.5.3 LTS, and also get a similar error. I cannot export a 3MF file.
"Error: Python: TypeError: Export3MF.init() takes 1 positional argument but 2 were given"

This seems like it should be an easy fix ?

Please forgive, I am completely new to using Github, but am reasonably experienced in Python.
I would like to help fix this, if you (honored Ghostkeeper or others) don't have the time.
Perhaps someone here could give me a few instructions on how to properly fix.
I can make a 'fork' and do it that way, but that seems like not the right way to address this problem.

Again, I am a total newb to Github, but I think I can help, if I just can get a few pointers on how to best/properly do it.
Some details:
I am running a recent Blender build using VSCode.
I'm in the process of creating a Blender addon to generate hyper-structures, just FYI (abemis.com).
Of course, I can easily output the fully manifold hyper-structure objects that I generate as STL, but I really feel that 3MF input/output is critical-essential. Any ideas/help is greatly appreciated.
Thanks.

[bitbasher]

i have this same issue .. i am going to fork the code to see if i can find a fix .. not that i know much about python

[Bruisefest]

Definitely having the same issue, unfortunately I'm somewhere around licking windows level of proficiency with coding, so tagging for follow-up.

[marekburiak]

Same issue here

As mentioned earlier, a workaround is to delete _init_ methods in these files (as def in #78):
...\AppData\Roaming\Blender Foundation\Blender\4.5\scripts\addons\io_mesh_3mf\import_3mf.py
...\AppData\Roaming\Blender Foundation\Blender\4.5\scripts\addons\io_mesh_3mf\export_3mf.py

I restarted Blender and the import works now

[Witcher1996]

Created a fix using Aistudio if anyone is interested

Blender3mfFormat-1.0.2.zip

[TjommeVergauwen]

Same issue here

As mentioned earlier, a workaround is to delete init methods in these files (as def in #78): ...\AppData\Roaming\Blender Foundation\Blender\4.5\scripts\addons\io_mesh_3mf\import_3mf.py ...\AppData\Roaming\Blender Foundation\Blender\4.5\scripts\addons\io_mesh_3mf\export_3mf.py

I restarted Blender and the import works now

This workaround does not work in Blender 5.0. It generates another error when trying to import a 3MF file:

[littlepcgogogo]

Created a fix using Aistudio if anyone is interested

Blender3mfFormat-1.0.2.zip

this works. Thank you!