Not installing on 4.2.2 LTS

[Bazmundi]

Confirmation

• I have followed the troubleshooting guide.

Summary

I download V1.6.0 and try to install from disc via add-ons menu. I get

Error: numpy.core.multiarray failed to import

Full dump:

(base) asterion@MonstaPC:~$ /opt/blender-4.2.2/blender --debug
Switching to fully guarded memory allocator.
Blender 4.2.2 LTS
Build: 2024-09-24 00:09:56 Linux Release
argv[0] = /opt/blender-4.2.2/blender
argv[1] = --debug
Reloading external rigs...
Reloading external metarigs...
TEXT FX V(4, 2, 2) READY
blender_checkpoint addon: Verbose is enabled
blender_checkpoint addon: Read in JSON settings from file
register_class(...):
Warning: 'CheckpointsList' does not contain '_UL_' with prefix and suffix
INFO: Ucupaint 2.3.4 is registered!
[AMP] Popup panel hotkeys initialized
DEBUG: Could not initialize window manager properties: 'WindowManager' object has no attribute 'display_vanilla_top_graph'
Error evaluating vanilla top menus for graph: 'WindowManager' object has no attribute 'display_vanilla_top_graph'
Error evaluating vanilla top menus for dope: 'WindowManager' object has no attribute 'display_vanilla_top_dope'
Error evaluating vanilla top menus for nla: 'WindowManager' object has no attribute 'display_vanilla_top_nla'
INFO: Ucupaint update routine is done in 0.10 ms!
Error in bpy.app.handlers.load_post[6]:
Traceback (most recent call last):
  File "/home/asterion/.config/blender/4.2/extensions/user_default/amp_animate_pro/__init__.py", line 162, in load_post_handler
    utils.dprint("Initializing AniMate Pro version: {}".format(bl_info["version"]))
                                                               ^^^^^^^
NameError: name 'bl_info' is not defined
--------
--------
load_icons called with folders:['icons', 'icons_grey']
--------
--------
[AniMate Pro] Icons reloaded successfully at 2025-09-09 22:15:17
Icons reloaded from handlers
[AniMate Pro] Falling back to file parsing for version
[AniMate Pro] Got version from file parsing: 0.25.30812
[AniMate Pro] Version check:
  - Current version: 0.25.30812
  - Stored version: 0.25.30812
  - Version file exists: True
  - Fresh install flag: False
  - Addon up to date flag: True
  - Is first install: False
  - Is fresh install: False
  - Is version update: False
  - Has default categories: True
[AniMate Pro] No action needed - addon is up to date
Skipping wheel for other system (macosx_10_10_x86_64 != linux_x86_64): pillow-11.2.1-cp311-cp311-macosx_10_10_x86_64.whl
Skipping wheel for other system (win_amd64 != linux_x86_64): skia_python-87.8-cp311-cp311-win_amd64.whl
Skipping wheel for other system (macosx_11_0_arm64 != linux_x86_64): pillow-11.2.1-cp311-cp311-macosx_11_0_arm64.whl
Skipping wheel for other system (win_amd64 != linux_x86_64): pillow-11.2.1-cp311-cp311-win_amd64.whl
Skipping wheel for other system (macosx_11_0_arm64 != linux_x86_64): skia_python-87.8-cp311-cp311-macosx_11_0_arm64.whl
Skipping wheel for other system (macosx_10_9_x86_64 != linux_x86_64): skia_python-87.6-cp311-cp311-macosx_10_9_x86_64.whl
RLSP: enter __init__
RLSP: exit __init__
RLPS: enter register() 

A module that was compiled using NumPy 1.x cannot be run in
NumPy 2.3.1 as it may crash. To support both 1.x and 2.x
versions of NumPy, modules must be compiled with NumPy 2.0.
Some module may need to rebuild instead e.g. with 'pybind11>=2.12'.

If you are a user of the module, the easiest solution will be to
downgrade to 'numpy<2' or try to upgrade the affected module.
We expect that some modules will need time to support NumPy 2.

Traceback (most recent call last):  File "/opt/blender-4.2.2/4.2/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 1345, in modal
    self.exec_command_finish(canceled)
  File "/opt/blender-4.2.2/4.2/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 2489, in exec_command_finish
    _preferences_install_post_enable_on_install(
  File "/opt/blender-4.2.2/4.2/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 698, in _preferences_install_post_enable_on_install
    addon_utils.enable(addon_module_name, default_set=True, handle_error=handle_error)
  File "/opt/blender-4.2.2/4.2/scripts/modules/addon_utils.py", line 488, in enable
    mod.register()
  File "/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/__init__.py", line 63, in register
    autoloader.find_classes()
  File "/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/blender/auto_load.py", line 58, in find_classes
    self.collect_all_submodules()
  File "/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/blender/auto_load.py", line 83, in collect_all_submodules
    self.modules = list(self.iter_submodules(directory, self.root_package_name))
  File "/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/blender/auto_load.py", line 87, in iter_submodules
    yield importlib.import_module("." + name, package_name)
  File "/opt/blender-4.2.2/4.2/python/lib/python3.11/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/blender/capture_panel.py", line 9, in <module>
    from . import capture_operators, rhubarb_operators, sound_operators, ui_utils
  File "/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/blender/sound_operators.py", line 9, in <module>
    import aud
AttributeError: _ARRAY_API not found
Unable to initialise audio
--------------------------------------------------------------------------------
- package=bl_ext.user_default.rhubarb_lipsync,module=blender.capture_panel
--------------------------------------------------------------------------------
Exception in module register(): /home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/__init__.py
Skipping wheel for other system (macosx_10_10_x86_64 != linux_x86_64): pillow-11.2.1-cp311-cp311-macosx_10_10_x86_64.whl
Skipping wheel for other system (win_amd64 != linux_x86_64): skia_python-87.8-cp311-cp311-win_amd64.whl
Skipping wheel for other system (macosx_11_0_arm64 != linux_x86_64): pillow-11.2.1-cp311-cp311-macosx_11_0_arm64.whl
Skipping wheel for other system (win_amd64 != linux_x86_64): pillow-11.2.1-cp311-cp311-win_amd64.whl
Skipping wheel for other system (macosx_11_0_arm64 != linux_x86_64): skia_python-87.8-cp311-cp311-macosx_11_0_arm64.whl
Skipping wheel for other system (macosx_10_9_x86_64 != linux_x86_64): skia_python-87.6-cp311-cp311-macosx_10_9_x86_64.whl
Error: numpy.core.multiarray failed to import
reloading addon meta-data: bl_ext.user_default.rhubarb_lipsync '/home/asterion/.config/blender/4.2/extensions/user_default/rhubarb_lipsync/blender_manifest.toml' (time-stamp change detected)

Rhubarb Lipsync NG addon version

1.6

Blender Version

4.2.2 LTS

Operating System

Linux (ubuntu)

[Premik]

This error occurs when importing the aud module. And there appears to be a conflict with the NumPy Python library versions.
Please open Blender's Python console and try:

import aud

This should give no error:

Then also check which NumPy version Blender's Python uses:

import numpy as np
print(np.__version__)

Please check the following issue. One user had the very similar problem on Windows and fixed it by reinstalling/downgrading NumPy back to v1.x:
#19

[Bazmundi]

```

>> import aud

A module that was compiled using NumPy 1.x cannot be run in NumPy 2.3.1 as it may crash. To support both 1.x and 2.x versions of NumPy, modules must be compiled with NumPy 2.0. Some module may need to rebuild instead e.g. with 'pybind11>=2.12'. If you are a user of the module, the easiest solution will be to downgrade to 'numpy<2' or try to upgrade the affected module. We expect that some modules will need time to support NumPy 2. Traceback (most recent call last): File "/opt/blender-4.2.2/4.2/scripts/startup/bl_operators/console.py", line 43, in execute return execute(context, self.interactive) File "/opt/blender-4.2.2/4.2/scripts/modules/console_python.py", line 166, in execute is_multiline = console.push(line_exec) File "/opt/blender-4.2.2/4.2/python/lib/python3.11/code.py", line 258, in push more = self.runsource(source, self.filename) File "/opt/blender-4.2.2/4.2/python/lib/python3.11/code.py", line 74, in runsource self.runcode(code) File "/opt/blender-4.2.2/4.2/python/lib/python3.11/code.py", line 90, in runcode exec(code, self.locals) File "<blender_console>", line 1, in <module> AttributeError: _ARRAY_API not found Traceback (most recent call last): File "<blender_console>", line 1, in <module> ImportError: numpy.core.multiarray failed to import ``` ```

>> np.__version__

'2.3.1' ```

…

On Wed, Sep 10, 2025 at 5:05 AM Premik ***@***.***> wrote: *Premik* left a comment (Premik/blender_rhubarb_lipsync_ng#27) <#27 (comment)> This error occurs when importing the aud module. And there appears to be a conflict with the NumPy Python library versions. Please open Blender's Python console and try: import aud This should give no error: image.png (view on web) <https://github.com/user-attachments/assets/afa2710a-a5c7-43b2-a8b9-06c4d85f1faf> Then also check which NumPy version Blender's Python uses: import numpy as npprint(np.__version__) Please check the following issue. One user had the very similar problem on Windows and fixed it by reinstalling/downgrading NumPy back to v1.x: #19 <#19> — Reply to this email directly, view it on GitHub <#27 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AANQYK65C2WXJHMYIXRZLTD3R4TYJAVCNFSM6AAAAACGAW3UQ2VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTENZSGAZDOOBWGY> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[Bazmundi]

Yep, so I'm using the paid version off superhive with says 3.3-4.4. There is a reference to 4.2+ in the github site. I did grab it for free from github to try it out on 3.6 ages ago and thought to help out by paying. But given what appers false advertising re version compatability I think I'll sort out a refund.

[Bazmundi]

Yeah, so I hopped back to scardyfish's version, and doesn't baulk during install with 4.2.2. Still looking into other issues with the scardyfish version.

[Premik]

Thank you for providing the details and sorry for troubles you're experiencing.

To clarify

• NumPy v2 introduced breaking changes and v1 cannot coexist with v2 in the same Python environment.
• The aud module is a Python binding for Blender's internal audaspace audio library (written in C). And rhubarb add-on uses aud for audio format conversions. Even though this conversion feature is optional the add-on will fail to register if the aud module is broken. Which is the issue you are experiencing.
• So while the add-on itself doesn't use the numpy library directly, its dependency aud/audaspace does. Depending on how the audaspace library was compiled, it requires either NumPy v1 or v2.

The audaspace C library on your system, which was likely installed as part of Blender requires NumPy v1. However, for some reason, Blender's Python environment has a NumPy v2.x version included as you have already identified.

In order to see more details, I spun up a fresh Ubuntu 22.04 (Jammy Jellyfish) machine and installed (by unzipping) blender-4.2.2-linux-x64.tar.xz from https://download.blender.org/release/Blender4.2/.
On that clean installation the NumPy version is 1.24.3, and import aud works correctly.

The question is: how did NumPy v2 get into the Python environment used by your Blender installation? I can think of a couple of possibilities:

• System-level Python libraries were somehow included in Blender's environment, and your system's package manager installed a newer version of NumPy.
• Another add-on upgraded NumPy, for instance, by running a pip command.

To rule out these possibilities, please try the following:

1. Download a fresh copy of Blender from: https://download.blender.org/release/Blender4.2/blender-4.2.2-linux-x64.tar.xz
2. Unzip it using the command: tar -xf blender-4.2.2-linux-x64.tar.xz
3. Run this new copy of Blender, go to the Scripting workspace, open a Python Console, and check which NumPy version it reports and the import aud commands as before.

Note on some system it is possible to install/reinstall the audaspace library separately. Which would make it work with NumPy v2. There was similar issue in #24

Edit:

import numpy as np
print(np.__file__)

should print path where the numpy was actually imported from. That would be quite useful too.