ModuleNotFoundError: No module named 'inference_core_nodes'

[POWERFULMOVES]

Prestartup times for custom nodes:
0.6 seconds: L:\Comfyui\ComfyUI\ComfyUI\custom_nodes\ComfyUI-Manager

Total VRAM 24564 MB, total RAM 32529 MB
xformers version: 0.0.25.post1
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3090 Ti : cudaMallocAsync
VAE dtype: torch.bfloat16
Using xformers cross attention
Traceback (most recent call last):
File "L:\Comfyui\ComfyUI\ComfyUI\nodes.py", line 1866, in load_custom_node
module_spec.loader.exec_module(module)
File "", line 940, in exec_module
File "", line 241, in call_with_frames_removed
File "L:\Comfyui\ComfyUI\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes_init.py", line 1, in
from inference_core_nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS
ModuleNotFoundError: No module named 'inference_core_nodes'

[tmprabubiz]

Same Problem

---

File "J:\ComfyUI\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes_init_.py", line 1, in
from inference_core_nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS
ModuleNotFoundError: No module named 'inference_core_nodes'

Cannot import J:\ComfyUI\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes module for custom nodes: No module named 'inference_core_nodes'

---

[foxmale007]

I tried to change the first row in init.py:

from .src.inference_core_nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS

but get another error:

ModuleNotFoundError: No module named 'diffusers.models.unets'

and then the errors gone when I upgrade diffusers from 0.25 to 0.27.2

[GzuPark]

@foxmale007 well, I've done with your trying aka fix init.
I use portable windows version of comfyui.

[Rachellaw888]

same problem

[abess96]

Same issue

[ultimatech-cn]

As readme ，try to install node by
"python install.py" or"..\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes>......\python_embeded\python.exe install.py

[randykoala]

tried all the approaches above but still get modulenotfound error

[zjs820]

As readme ，try to install node by "python install.py" or"..\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes>......\python_embeded\python.exe install.py

I can do it for the portable version but when it's the non-portable version it become like this:

(venv) E:\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes>e:\comfyui\venv\scripts\python.exe install.py
Traceback (most recent call last):
  File "E:\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes\install.py", line 16, in <module>
    def try_get_cuda_version() -> str | None:
TypeError: unsupported operand type(s) for |: 'type' and 'NoneType'

[Stone-dielianhua]

Same issue

[farhang0]

SAME here

File "...\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes\__init__.py", line 1, in <module>
    from inference_core_nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS
ModuleNotFoundError: No module named 'inference_core_nodes'

Cannot import ...\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes module for custom nodes: No module named 'inference_core_nodes'

[ultimatech-cn]

Before running install.py, may install fllit-core first. In portable version,
F:\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes>......\python_embeded\python.exe -m pip install flit-core

[farhang0]

Before running install.py, may install fllit-core first. In portable version, F:\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes>......\python_embeded\python.exe -m pip install flit-core

thanks for your response , I've already tried this approach, but it hasn't been successful and the issue remains.😞

[jjandnn]

我发现很多伙伴是没把解决这个问题的步骤看清楚。
我来详细说明一遍：

首先造成这个错误的原因：
ComfyUI-Inference-Core-Nodes 这个包看上去是在 custom_nodes 文件夹中，但其实没有自动编译安装。
安装时缺少flit-core这个依赖。
如果你没有 custom_nodes 目录中没有 ComfyUI-Inference-Core-Nodes 文件夹，那请你先
git clone https://github.com/LykosAI/ComfyUI-Inference-Core-Nodes，然后把文件夹复制进 ComfyUI-Inference-Core-Nodes 文件夹中。

接着我们来解决：

1，打开你电脑的cmd窗口。
2，把你的 ComfyUI_windows_portable 程序包根目录下的 python_embeded 文件夹中的 python.exe 拖拽到cmd窗口中，则窗口中自动填入了这个python程序的路径，如：
xxx:\ComfyUI_windows_portable\python_embeded\python.exe
xxx指的是你的具体硬盘盘符，比如D，E或F
3，然后，我们来补全并一个个执行命令，分别是：
xxx:\ComfyUI_windows_portable\python_embeded\python.exe -m pip install flit-core
回车
cd xxx:\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes
回车
xxx:\ComfyUI_windows_portable\python_embeded\python.exe -m pip install -e .
回车
注意啊，上面这句最后有个“.”

ok。

EN：
I realized that a lot of partners are not reading the steps to solve this problem clearly.
Let me explain it in detail:

First of all, the cause of this error:
The package ComfyUI-Inference-Core-Nodes appears to be in the custom_nodes folder, but it is not automatically compiled and installed.
The flit-core dependency is missing from the installation.
If you don't have a ComfyUI-Inference-Core-Nodes folder in your custom_nodes directory, then please first
git clone https://github.com/LykosAI/ComfyUI-Inference-Core-Nodes and copy the folder into the ComfyUI-Inference-Core-Nodes folder.

Then let's solve it:

1, open the cmd window of your computer.
2, drag and drop python.exe from the python_embedded folder in the root directory of your ComfyUI_windows_portable package into the cmd window, and the path to the python program will be automatically filled in the window, e.g.:
xxx:\ComfyUI_windows_portable\python_embedded\python.exe
xxx refers to your specific hard disk drive letter, such as D, E or F.
3, then, let's complement and execute the commands one by one, respectively:
xxx:\ComfyUI_windows_portable\python_embedded\python.exe -m pip install flit-core
Enter
cd xxx:\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-Inference-Core-Nodes
Enter
xxx:\ComfyUI_windows_portable\python_embedded\python.exe -m pip install -e .
Enter
Notice the "." at the end of the above sentence.

OK.

Translated with DeepL.com ，my EN is so pure！

[boblapo]

ERROR: Package 'inference-core-nodes' requires a different Python: 3.12.3 not in '<3.12,>=3.10'
jjandnn fix still work but if you have newer Python you have to modify the pyproject.toml file line 9:
requires-python = ">=3.10,<=3.12.3"
install worked.

[KristoAI]

Ok I finally solved this issue. This is merge from another solution but with a final resolution.

Someone Else I tried to change the first row in init.py:

from .src.inference_core_nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS

but get another error:

ModuleNotFoundError: No module named 'diffusers.models.unets'

My resolution*

Open \pathto\ComfyUI\venv\Scripts in cmd.

use these commands:
activate
pip install diffusers (It should install a new diffusers or update)
pip install torch transformers (Likely wont do anything new)
python -c "import diffusers; print(diffusers.version)" (Should display the current version. For me it was 0.29.0.)

Launch comfyui. For me I did this for Stability Matrix's install of comfyui which I suspect has some bugs. I needed this for ControlNet to stop giving me an error in the inference tab of Stability Matrix.
My error was : Cannot execute because node Inference_Core_AIO_Preprocessor does not exist.

This fixed all of that.