Failure to import `.blend` with Blender package from Arch Linux

[snoopdouglas]

Godot version

4.0.2-stable

System information

Fedora 37

Issue description

This is related to #67275. I noticed my .blend imports failing after my recent upgrade from Blender 3.3.1 to 3.5.0.

Blender 3.5 hasn't yet been discussed in that issue, and so @lyuma suggested this may be a different problem to the ones we've experienced between 3.0 & 3.4.

I have also confirmed this isn't a problem with Blender 3.4.1.

As is the case with #67275, the import keeps happening on a loop, which prevents me from working because the import modal repeatedly pops up:

Aside: it'd be useful to be able to debug this from the production editor build, perhaps by dumping Blender stderr into .godot/ somewhere.

Steps to reproduce

• Ensure Blender 3.5 is installed + configured for Godot and that imports are enabled on the current project
• Add any .blend file to the project

You'll need to keep mashing Ctrl+Q to get the editor to quit after this.

Minimal reproduction project

src.zip

[Cthuflu]

Some additional logging (using the Overgrown Subway Scene project) and a build of master at d023e51 on Fedora 37 with Blender 3.5 reveals that the same error occurs for every model with

Blender 3.5.0 (hash unknown built 2023-04-06 00:00:00)
BLT_lang_init: 'locale' data path for translations not found, continuing
Read prefs: /home/jacob/.config/blender/3.5/config/userpref.blend
Read blend: /home/jacob/Projects/Games/Overgrown Subway Scene/outside_walls/outside_walls.blend
Error: Python: Traceback (most recent call last):
  File "<string>", line 9, in <module>
  File "/usr/share/blender/3.5/scripts/modules/bpy/ops.py", line 113, in __call__
    ret = _op_call(self.idname_py(), None, kw)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: Calling operator "bpy.ops.export_scene.gltf" error, could not be found

Blender quit
ERROR: Condition "err != OK" is true. Returning: ERR_FILE_CANT_OPEN
   at: append_from_file (modules/gltf/gltf_document.cpp:7431)                                                                                                                                                                                 
ERROR: Error importing 'res://outside_walls/outside_walls.blend'.
   at: _reimport_file (editor/editor_file_system.cpp:2033)

[Cthuflu]

Core add-ons got missed, oops. This was fixed a few days ago for Fedora 38, but it had not been fixed in Fedora 37 before I upgraded.

This is happening because godot is expecting a plugin like io_scene_gltf2 to exist and be enabled, as it's usually packaged by default. However, blender recently restructured their source repository which seems to have removed the addons git submodule; which the package maintainers missed during this update.

[MartinHaeusler]

As @lyuma asked for it in another ticket, here's a minimal Godot project which reproduces the problem. Apologies for the file size (25MB zipped, around 80MB unzipped), the bug occurred for me for this particular mesh. Everybody should be able to grab the project here:

https://drive.google.com/file/d/1x0qtp9gOUEhcNYNqRqXPATD7WDu2dPmC/view?usp=sharing

This is what the project looks like for me:

There are several issues with this minimal project for me:

• "gothicWindow1.blend" imports just fine, but "grandLibrary_01.blend" does not. I've verified that the file opens correctly in Blender 3.5.1 and it is fine (some missing textures aside). I haven't been able to discern the decisive difference between these two files.
  • The error log says:

    modules/gltf/gltf_document.cpp:7431 - Condition "err != OK" is true. Returning: ERR_FILE_CANT_OPEN
    Error importing 'res://grandLibrary_01.blend'.

• Whenever the Godot window loses focus and regains focus, it attempts to reimport the "grandLibrary_01.blend" again.

My Setup:

• OS: Windows 10 x64
• CPU: AMD Ryzen 7 3700X
• GPU: RTX 3080
• RAM: 32 GB
• Godot: v4.0.3.stable.mono.official [5222a99]
• Blender: 3.5.1

I do have multiple blender installations floating around on my machine, is that a problem? I specified the 3.5.1 version in the Godot settings. I had to disable and re-enable the "Blender" import plugin to make Godot recognize the *.blend files at all.

[Zireael07]

Does the library blend import if you rename it to something w/o underscore?

[MartinHaeusler]

@Zireael07 no, haven't tried that. Would be really funny if that were the case. I can try it when I get home after work today.

[MartinHaeusler]

@Zireael07 I've tried renaming the file by removing the underscore, unfortunately the behavior is still the same. So that wasn't the cause.

[ShawkMusic]

I'm getting this error in Godot 4.1.1 with Blender 3.6.0

It seemed to be working before, although I don't know if that was because I was on Godot 4.1 or an earlier version of Blender, or something else entirely.

[nano13]

Pretty much the same issue here, the error message looks slightly different for me:

ERROR: Condition "err != OK" is true. Returning: ERR_FILE_CANT_OPEN
   at: append_from_file (modules/gltf/gltf_document.cpp:7447)
ERROR: Error importing 'res://Models/suzuki_motorbike_wheel_front.blend'.
   at: _reimport_file (editor/editor_file_system.cpp:2044)
Blender 3.6.0 (hash c7fc78b81ecb built 2023-07-07 13:20:07)
Read prefs: "/home/samuel/.config/blender/3.6/config/userpref.blend"
Read blend: "/home/samuel/programmierung/godot/GodotFirstPersonController/Models/suzuki_motorbike_wheel_rear.blend"
Error: Python: Traceback (most recent call last):
  File "<string>", line 9, in <module>
  File "/usr/share/blender/3.6/scripts/modules/bpy/ops.py", line 113, in __call__
    ret = _op_call(self.idname_py(), None, kw)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: Converting py args to operator properties: : keyword "export_nla_strips" unrecognized

Blender quit

Godot version

v4.2.dev.custom_build [https://github.com/godotengine/godot/commit/75f9c97deaa8378477441e07ea1782ecab6d2eca]
System information

Godot v4.2.dev (75f9c97) - Arch Linux #1 SMP PREEMPT_DYNAMIC Mon, 24 Jul 2023 20:19:38 +0000 - X11 - Vulkan (Forward+) - dedicated AMD Radeon RX 5500 XT () - AMD Ryzen 7 2700X Eight-Core Processor (16 Threads)

[ShawkMusic]

Testing this, I was previously using Blender through pacman (v3.6.0), but the Blender flatpak (v3.6.1) seems to not have this issue. I wonder if this is because of the slightly newer version or because of the packaging format. (flatpak vs system package manager)

@nano13 If you want to solve this issue now and don't mind using flatpak, install the org.blender.Blender flatpak and set the "Blender 3 Path" in Godot's editor settings to /var/lib/flatpak/app/org.blender.Blender/x86_64/stable/active/files/blender/

[cg9999]

Arch linux blender package currently in testing (3.6.1-1) doesn't have this issue anymore. Earlier version had the
keyword "export_nla_strips" unrecognized error message printed.