Archipack PRO 2.8.4 installation - Blender 5.0.1

[suelambot]

Hi,

I'm trying to install Archipack on a fresh Blender 5.0.1 installation on a linux machine but it's failing with the following error messages:

At installation:

CAD Transform not found, fallback to blender's native snap
TypeError: update keyword: expected a function taking 2 arguments, not 4
Archipack PRO 2.8.4 register() error material
bpy_struct "archipack_material" registration error: 'material' EnumProperty could not register (see previous error)
Exception in module register(): /home/user/.config/blender/5.0/scripts/addons/archipack_20/__init__.py
Traceback (most recent call last):
  File "/usr/share/blender/5.0/scripts/modules/addon_utils.py", line 515, in enable
    mod.register()
    ~~~~~~~~~~~~^^
  File "/home/user/.config/blender/5.0/scripts/addons/archipack_20/__init__.py", line 1582, in register
    module.register()
    ~~~~~~~~~~~~~~~^^
  File "/home/user/.config/blender/5.0/scripts/addons/archipack_20/archipack_material.py", line 1449, in register
    bpy.utils.register_class(archipack_material)
    ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^
ValueError: bpy_struct "archipack_material" registration error: 'material' EnumProperty could not register (see previous error)
Error: bpy_struct "archipack_material" registration error: 'material' EnumProperty could not register (see previous error)
Traceback (most recent call last):
  File "/usr/share/blender/5.0/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 1502, in execute
    cmd_batch = self.exec_command_iter(is_modal)
  File "/usr/share/blender/5.0/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 2593, in exec_command_iter
    self.exec_legacy(source_filepath)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/share/blender/5.0/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 2726, in exec_legacy
    bpy.types.PREFERENCES_OT_addon_install.execute(self, bpy.context)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "/usr/share/blender/5.0/scripts/startup/bl_operators/userpref.py", line 830, in execute
    bpy.ops.preferences.addon_enable(module=mod.__name__)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
  File "/usr/share/blender/5.0/scripts/modules/bpy/ops.py", line 109, in __call__
    ret = _op_call(self.idname_py(), kw)
RuntimeError: Error: bpy_struct "archipack_material" registration error: 'material' EnumProperty could not register (see previous error)

00:24.036  bpy.rna          | ERROR Python script error in EXTENSIONS_OT_package_install_files.execute

after installation, if i try to activate the plugin:

CAD Transform not found, fallback to blender's native snap
Exception in module register(): /home/user/.config/blender/5.0/scripts/addons/archipack_20/__init__.py
Traceback (most recent call last):
  File "/usr/share/blender/5.0/scripts/modules/addon_utils.py", line 515, in enable
    mod.register()
    ~~~~~~~~~~~~^^
  File "/home/user/.config/blender/5.0/scripts/addons/archipack_20/__init__.py", line 1574, in register
    addon_updater_ops.register(bl_info)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/user/.config/blender/5.0/scripts/addons/archipack_20/addon_updater_ops.py", line 1208, in register
    bpy.utils.register_class(cls)
    ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
ValueError: register_class(...): already registered as a subclass 'ARCHIPACK_OT_updater_install_popup'

Am i doing something wrong or are there still compatibility issues with blender 5 ?

Many thanks,

Sue.

[s-leger]

Looks like for some unknown reason the addon is loaded twice. Would hit the uninstall button beside the addon in preferences, restart blender and see if it still is there.
Once the addon is properly removed, you may reinstall.

[j0s]

I got a very similar error on blender 5.1 with Archipack PRO 2.8.5, even after removing my ~/.config/blender/5.1 dir to start from scratch:

Python: Traceback (most recent call last):
  File "/usr/share/blender/5.1/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 1504, in execute
    cmd_batch = self.exec_command_iter(is_modal)
  File "/usr/share/blender/5.1/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 2598, in exec_command_iter
    self.exec_legacy(source_filepath)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/share/blender/5.1/scripts/addons_core/bl_pkg/bl_extension_ops.py", line 2731, in exec_legacy
    bpy.types.PREFERENCES_OT_addon_install.execute(self, bpy.context)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "/usr/share/blender/5.1/scripts/startup/bl_operators/userpref.py", line 830, in execute
    bpy.ops.preferences.addon_enable(module=mod.__name__)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^
RuntimeError: Error: bpy_struct "archipack_material" registration error: 'material' EnumProperty could not register (see previous error)

Edit: managed to install it after removing ~/.cache/blender, but got the same error again when trying to enable it.
Edit again: not sure what happened that last time, now that I remove both the config and cache folders I get the same error again when installing.

[suelambot]

re-installing or purging ~/.cache/blender also didn't work for me.
I downloaded 2.8.5 and tried with that version as well without luck. the error message remains the same.

[j0s]

For me it worked with a flatpak installation of blender 5.1.2, which is the same version that failed when installed using the system package manager. I'm guessing it's caused by this:

❯ blender -b --python-expr "import sys; print(f'PYTHON VERSION: {sys.version}')"
Blender 5.1.2 (hash ec6e62d40fa9 built 2026-05-19 10:38:26)
PYTHON VERSION: 3.14.5 (main, May 10 2026, 18:26:20) [GCC 16.1.1 20260430]

❯ flatpak run org.blender.Blender -b --python-expr "import sys; print(f'PYTHON VERSION: {sys.version}')"
Blender 5.1.2 (hash ec6e62d40fa9 built 2026-05-19 02:18:37)
----------------------------------------------
No module named 'blenderbim'
Archipack ifc export fallback
Archipack PRO 2.8.5 : ready
----------------------------------------------
PYTHON VERSION: 3.13.9 (main, Apr 25 2025, 12:39:20) [GCC 14.2.1 20250110 (Red Hat 14.2.1-7)]

Flatpak uses python from org.freedesktop.Platform which is version 3.13.9, while the Archlinux package uses the system python version 3.14.5.

I'd be happy to use the flatpak version if only it supported HIP acceleration (flathub/org.blender.Blender#180).

[s-leger]

Would advice to setup portable release of blender right from blender.org instead so we all get the exact same environment.

[suelambot]

I'm on an arch based linux too ( cachy OS)
I tried the version version downloaded from blender.org but I'm having the same error message.

I installed the flatpak version which let me activate the plugin.
Unfortunately, trying to build a wall (I had access to the wall selection menu) gave me the following error:

Python: Traceback (most recent call last):
  File "/home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_wall2.py", line 7711, in modal
    snap_point(
    ~~~~~~~~~~^
        context,
        ^^^^^^^^
    ...<3 lines>...
        release_confirm=False
        ^^^^^^^^^^^^^^^^^^^^^
    )
    ^
  File "/home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_snap.py", line 933, in snap_point
    bpy.ops.archipack.snap('INVOKE_DEFAULT')
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
RuntimeError: Error: Python: Traceback (most recent call last):
  File "/home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_snap.py", line 796, in invoke
    self.init(context, event)
    ~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_snap.py", line 637, in init
    self.create_helper(context)
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^
  File "/home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_snap.py", line 689, in create_helper
    self.link_object_to_scene(context, helper)
    ~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_abstraction.py", line 1432, in link_object_to_scene
    coll = cls.get_collection(context, o, layer_name, default_layer)
TypeError: 'classmethod' object is not callable
Location: /home/sue/.var/app/org.blender.Blender/config/blender/5.1/scripts/addons/archipack_20/archipack_snap.py:933
``

[s-leger]

You must update archipack to 2.8.5 at least.
Python and numpy shipped with blender are custom builds, so any other disto method may result in unpredictable results.

[suelambot]

indeed I was still on 2.8.4.
The flatpak version is a viable workaround for me.

[j0s]

Would advice to setup portable release of blender right from blender.org instead so we all get the exact same environment.

The release from blender.org uses Python 3.13.9, and with that Archipack worked nicely, and also HIP acceleration.