[Bug]I have followed the instructions to install the ComfyUI-NanChaku extension, and the installation completes successfully. However, when I restart ComfyUI, the NanChaku node does not appear and is shown as a missing node in the interface.

[bhadani2578]

Checklist

• 1. I have searched for related issues and FAQs (https://github.com/mit-han-lab/nunchaku/blob/main/docs/faq.md) but was unable to find a solution.
• 2. The issue persists in the latest version.
• 3. Please note that without environment information and a minimal reproducible example, it will be difficult for us to reproduce and address the issue, which may delay our response.
• 4. If your report is a question rather than a bug, please submit it as a discussion at https://github.com/mit-han-lab/nunchaku/discussions/new/choose. Otherwise, this issue will be closed.
• 5. If this is related to ComfyUI, please report it at https://github.com/mit-han-lab/ComfyUI-nunchaku/issues.
• 6. I will do my best to describe the issue in English.

Describe the Bug

System Info:

OS: Windows 11 (64-bit)

Python Version: 3.10

GPU: NVIDIA RTX 3060 (12 GB VRAM)

ComfyUI version: (mention exact date or commit hash if possible)

Installation method: Cloned manually / Installed via ComfyUI-Manager (mention which one)

Steps Taken:

Cloned the ComfyUI-NanChaku repo into the custom_nodes directory:

bash
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git clone https://github.com/TencentARC/ComfyUI-NanChaku.git custom_nodes/ComfyUI-NanChaku
Ran the requirements.txt installation:

bash
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cd custom_nodes/ComfyUI-NanChaku
python -m pip install -r requirements.txt
→ This completed without errors.

Restarted ComfyUI, but the node is missing with the following error in the terminal:

vbnet
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[ERROR] Node class 'NanChakuFluxDiTLoader' not found
Troubleshooting Tried:

Confirmed correct Python version (3.10).

Re-installed dependencies in a clean environment.

Verified presence of init.py and main node files.

Checked for typos in folder name and path.

Verified that other custom nodes load fine.

Expected Behavior:
After restarting ComfyUI, I should be able to see and use the NanChakuFluxDiTLoader node in the node search panel without errors.

Actual Behavior:
Node shows up as “missing” in workflows and does not appear in the node list.

Logs (if available):
Please include full error log or screenshot if you have one.

Environment

OS: Windows 11 (64-bit)

Python Version: 3.10

GPU: NVIDIA RTX 3060 (12 GB VRAM)

ComfyUI version: (mention exact date or commit hash if possible)

Installation method: Cloned manually / Installed via ComfyUI-Manager (mention which one)

Reproduction Steps

Steps Taken:

Cloned the ComfyUI-NanChaku repo into the custom_nodes directory:

bash
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Edit
git clone https://github.com/TencentARC/ComfyUI-NanChaku.git custom_nodes/ComfyUI-NanChaku
Ran the requirements.txt installation:

bash
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Edit
cd custom_nodes/ComfyUI-NanChaku
python -m pip install -r requirements.txt
→ This completed without errors.

Restarted ComfyUI, but the node is missing with the following error in the terminal:

vbnet
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Edit
[ERROR] Node class 'NanChakuFluxDiTLoader' not found

[Apok1]

Hi, This might not help as I'm not expert and stuck myself, but as it's been 2 days:

Did you install the backend? Following this you tube guide??

If so and the import test worked, have you tried installing via ComfyUI manager instead? (Custom nodes option)

[lmxyy]

Could you share your log? Also, did you install the nunchaku wheel? You can use this workflow to install it now.

[bhadani2578]

Bug resolved and working fine.