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I've downloaded the Windows prebuilt AN 2.0 and installed on Blender 2.78C. AN loads fine on startup and seems to work, but I am doing additional development and when I reload with F8, the following AN error is generated.

Animation Nodes can't be reloaded. Exception in module register(): 'E:\00visualNotes\workspace\visualNotes\addons\animation_nodes\__init__.py' Traceback (most recent call last): File "C:\Program Files\Blender Foundation\Blender\2.78\scripts\modules\addon_utils.py", line 349, in enable mod.register() File "E:\00visualNotes\workspace\visualNotes\addons\animation_nodes__init__.py", line 176, in register bpy.utils.register_module(name) File "C:\Program Files\Blender Foundation\Blender\2.78\scripts\modules\bpy\utils__init__.py", line 618, in register_module raise Exception("register_module(%r): defines no classes" % module) Exception: register_module('animation_nodes'): defines no classes

Any help with this would be greatly appreciated.

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Animation Nodes 2.0 does not support reloading.

This is because Python does not support reloading of extension modules, which AN has a lot of since it uses Cython.

So unfortunately you will have to disable AN completely during development or restart Blender every time you make a change.

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  • $\begingroup$ Is it possible to build with the original python versions of the CPython modules and would this allow reloading? $\endgroup$ Commented Aug 19, 2017 at 9:43
  • $\begingroup$ Another thought... Is it possible for me to create two addons: AN2.0 and MyAddon which imports AN2. Disable reload on AN2 and reload MyAddon. $\endgroup$ Commented Aug 19, 2017 at 14:43

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