Add-on Doesnt work "Python: TypeError: Import3MF.__init__() takes 1 positional argument but 2 were given"

[NBurger97]

How is there a code issue in this?

[Cobis-Knight]

I hit this issue yesterday, it's already been raised Win 11 Blender 4.5.3 LTS Python: TypeError: Import3MF, and a pull request #78 created.
Until the pull request is approved I just edited the import and export files to remove the init once I'd installed the add-on

[victorf2dev]

Python: TypeError: Export3MF.__init__() takes 1 positional argument but 2 were given

Using Blender 4.5.3 on Linux Manjaro.

[pponec]

The proposed fix is here in this pull-request.

[hmedina]

We're now into Blender 5 ; people who installed Blender via auto-updating systems (Steam, Windows Store) will likely get migrated up, so it's not just Blender 4.5 anymore.

[clonstyle88]

I found this issue ,too. I think the plug-in hasn't support the latest version5.0

[TjommeVergauwen]

Indeed, Blender 5.0 has the same issue. The proposed fix does not work

[brendengross144]

This add-on was written around Blender 2.8–2.9 era. In Blender 3.x and especially 4.x, operator instantiation behavior changed slightly: Blender may pass arguments into init. Overriding init in operators is now strongly discouraged, Blender’s own documentation explicitly says: Operators should not define init. Remove init entirely, Blender operators should initialize state inside execute(), not init. It already does that correctly at the top of execute():
The Fix is to delete the entire def init(self): block in the import_3mf.py file.
def init(self):
super().init()
self.resource_objects = {}
self.resource_materials = {}
self.resource_to_material = {}
self.num_loaded = 0

This work around allowed Blender to properly open the Addon and allow importation. Once the long term Pull request nukes this def code block, that will fix it for good.

[rxpc]

By removing def init(self) block works, however, when I export the model from Blender and import into Bambu Studio, the model is insanely huge and no colors.

I'm not sure if this addon was intended to import colors or just to have the .3mf format available to import/export from Blender to Bambu Studio?