Doesn't work on Arch Linux: IndexError: bpy_prop_collection[index]: index 3 out of range, size 3

[juozasmiskinis]

Describe the bug
This error comes up when trying to display some object using GUI or Python.

Python: Traceback (most recent call last):
  File "/home/user/.config/blender/4.1/scripts/addons/batoms/ops/add_object.py", line 129, in execute
    batoms = Batoms(label=self.label, from_ase=atoms)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.1/scripts/addons/batoms/batoms.py", line 156, in __init__
    self._cell = Bcell(label, cell, batoms=self)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/user/.config/blender/4.1/scripts/addons/batoms/cell.py", line 28, in __init__
    self.build_object(array, location)
  File "/home/user/.config/blender/4.1/scripts/addons/batoms/cell.py", line 69, in build_object
    self.build_geometry_node()
  File "/home/user/.config/blender/4.1/scripts/addons/batoms/cell.py", line 100, in build_geometry_node
    links.new(PositionCell.outputs["Position"], TransferCell.inputs[3])
                                                ~~~~~~~~~~~~~~~~~~~^^^
IndexError: bpy_prop_collection[index]: index 3 out of range, size 3

To Reproduce
Steps to reproduce the behavior:

1. Install on Arch Linux using the manual installation method.
2. In Object mode, click Add -> Batoms -> Atoms. The error appears.

Alternatively, in the Python terminal:

1. Define the H2O molecule as suggested in the Usage section:

from batoms import Batoms
h2o = Batoms("h2o",
            species = ["O", "H", "H"],
            positions= [[0, 0, 0], [0, -0.76, -0.6], [0, 0.76, -0.6]])

2. The error appears after the attempt to define h2o.

Expected behavior
There should be no errors.

Desktop:
OS: Arch Linux 6.8.7-arch1-1

Blender Version
4.1.1

Additional context
AFAIK, there is no such thing as Blender’s bundled python location on Arch Linux, therefore I can't use install.py.

[liuyun88]

I can reproduce this error on Blender 4.1.1 on Windows 11

[superstar54]

Hi @juozasmiskinis and @liuyun88 , thanks for reporting this issue. I can also reproduce this error. There seems an update of Python API in Blender 4.1.1. I will fix this issue asap.

[superstar54]

Hi All, indeed, Blender 4.1 refactors the sockets of many nodes in this PR. I suggest you use Blender 4.0 for the moment.
I will update you when I fix this issue.

[juozasmiskinis]

Thanks for the heads up!

[liuyun88]

Just wondering if this has been fixed. Using the blender4.1 branch still gives the following error

Traceback (most recent call last): File "<blender_console>", line 1, in <module> File "<string>", line 19, in <module> File "/usr/share/blender/4.1/scripts/addons/batoms/batoms.py", line 156, in __init__ self._cell = Bcell(label, cell, batoms=self) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/share/blender/4.1/scripts/addons/batoms/cell.py", line 28, in __init__ self.build_object(array, location) File "/usr/share/blender/4.1/scripts/addons/batoms/cell.py", line 69, in build_object self.build_geometry_node() File "/usr/share/blender/4.1/scripts/addons/batoms/cell.py", line 157, in build_geometry_node input_nodes[faces[i][j]].outputs["Value"], ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^ KeyError: 'bpy_prop_collection[key]: key "Value" not found'