Rigify armature generation crashes on Blender 3.0 & 3.6

[Atte Viitanen]

Hi, it seems that the plugin is crashing when generating the Rigify armature / Humanized VRM Rig on fresh Blender 3.0 and 3.6 installs in Windows with a VRM from VRoid Studio.

Upon importing a fresh VRM file exported from Vroid Studio 0.14.0, selecting the armature and doing Generate Humanized VRM Rig, I get the following error on both Blender versions:

Python: Traceback (most recent call last):
  File "C:\Users\SomeUser\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\vrm_rigify\__init__.py", line 42, in execute
    meta_rig = meta.generate_meta_rig(vroid_rig)
  File "C:\Users\SomeUser\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\vrm_rigify\meta.py", line 69, in generate_meta_rig
    bpy.ops.object.armature_human_metarig_add()
  File "C:\Program Files\Blender Foundation\Blender 3.6\3.6\scripts\modules\bpy\ops.py", line 113, in __call__
    ret = _op_call(self.idname_py(), None, kw)
AttributeError: Calling operator "bpy.ops.object.armature_human_metarig_add" error, could not be found

Blender version: 3.0.1 / 3.6.3
vrm-rigify version: latest build (Aug 20, 2023)
VRM-Addon-for-Blender version: 2.20.7
Vroid Studio version: 0.14.0

What's the supported Blender version for this plugin? I could not find any info.

[Atte Viitanen]

Turns out this was simply a case of forgetting to enable the Rigify addon. Plugin work fine now with Rigify enabled, sorry for the false alarm!

Could be useful to run some kind of check that Rigify is present and issue a more descriptive warning if not. This armature_human_metarig_add function in the error stack was pretty badly documented, leading me to take a while to realize what the underlying issue was.

[Nanoskript]

Fixed in cd00b1f. 👍