ComfyUI Manager: Impossible To Download Missing Nodes and Update Available | Error: Node ID '#42

[PixelArmony]

Expected Behavior

Hello,

I use the "ComfyUI_windows_portable_nvidia" version of ComfyUI, unziped everything in a new folder, and applied all updates by running the update_comfyui_and_python_dependencies.bat file. After that, I loaded a functional workflow from a previous ComfyUI installation that I had deleted months ago. That’s the only action I took.

1 - Every time I try to install missing nodes by clicking the install button, the process gets stuck in a loop, and nothing downloads.
2 - If I click on the Update Available button, the internet browser is also stuck and a message appears after a few seconds.
3 - I've got a Node ID '#42 error.

Actual Behavior

1 - Impossible to download missing nodes and update available.
2 - Page Unresponsive.
3 - Other errors: Node ID '#42.

Steps to Reproduce

1 - Impossible to download missing nodes and update available:

• I even waited for over 30 minutes, but nothing happened.
• I tried switching browsers from Chrome to Edge, but the issue persisted.
• I checked my firewall settings, and everything appears to be fine.

Impossible to download; missing nodes

Impossible to download: update available

2 - Page Unresponsive issue:

3 - Other error:

invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#42'", 'extra_info': {}}

Debug Logs

(base) D:\AI\ComfyUI>run_nvidia_gpu_fast_fp16_accumulation.bat

(base) D:\AI\ComfyUI>.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build --fast fp16_accumulation
Checkpoint files will always be loaded safely.
Total VRAM 11264 MB, total RAM 65446 MB
pytorch version: 2.7.0+cu128
Enabled fp16 accumulation.
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 2080 Ti : cudaMallocAsync
Using pytorch attention
Python version: 3.12.10 (tags/v3.12.10:0cc8128, Apr  8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]
ComfyUI version: 0.3.34
ComfyUI frontend version: 1.19.9
[Prompt Server] web root: D:\AI\ComfyUI\python_embeded\Lib\site-packages\comfyui_frontend_package\static

Import times for custom nodes:
   0.0 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\websocket_image_save.py

Starting server

To see the GUI go to: http://127.0.0.1:8188
got prompt
invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#42'", 'extra_info': {}}

Other

No response

[christian-byrne]

Thanks for reporting that, working on a fix now. The menu should not be accessible if you don't have ComfyUI-Manager installed (bug).

In the meantime, can you install https://github.com/Comfy-Org/ComfyUI-Manager and then try again? That should fix the issue.

[christian-byrne]

I've made a fix: Comfy-Org/ComfyUI_frontend#3925. Thanks for surfacing this bug.

[PixelArmony]

Hello Christian-byrne,

Thank you for your quick answer. I have installed https://github.com/Comfy-Org/ComfyUI-Manager
And updated ComfyUI using the .bat file update_comfyui.bat in D:\AI\ComfyUI\update
(ComfyUI-Manager is installed in D:\AI\ComfyUI\ComfyUI\custom_nodes)

Here is the debug log:

---

(base) D:\AI\ComfyUI>run_nvidia_gpu_fast_fp16_accumulation.bat

(base) D:\AI\ComfyUI>.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build --fast fp16_accumulation
[START] Security scan
[DONE] Security scan

ComfyUI-Manager: installing dependencies. (GitPython)

WARNING: The script pygmentize.exe is installed in 'D:\AI\ComfyUI\python_embeded\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
WARNING: The script chardetect.exe is installed in 'D:\AI\ComfyUI\python_embeded\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
WARNING: The script markdown-it.exe is installed in 'D:\AI\ComfyUI\python_embeded\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
WARNING: The script typer.exe is installed in 'D:\AI\ComfyUI\python_embeded\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.

ComfyUI-Manager: installing dependencies done.

** ComfyUI startup time: 2025-05-18 19:02:04.239
** Platform: Windows
** Python version: 3.12.10 (tags/v3.12.10:0cc8128, Apr 8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]
** Python executable: D:\AI\ComfyUI\python_embeded\python.exe
** ComfyUI Path: D:\AI\ComfyUI\ComfyUI
** ComfyUI Base Folder Path: D:\AI\ComfyUI\ComfyUI
** User directory: D:\AI\ComfyUI\ComfyUI\user
** ComfyUI-Manager config path: D:\AI\ComfyUI\ComfyUI\user\default\ComfyUI-Manager\config.ini
** Log path: D:\AI\ComfyUI\ComfyUI\user\comfyui.log
WARNING: The script f2py.exe is installed in 'D:\AI\ComfyUI\python_embeded\Scripts' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
[ComfyUI-Manager] 'numpy' dependency were fixed

Prestartup times for custom nodes:
25.5 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\ComfyUI-Manager

Checkpoint files will always be loaded safely.
Total VRAM 11264 MB, total RAM 65446 MB
pytorch version: 2.7.0+cu128
Enabled fp16 accumulation.
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 2080 Ti : cudaMallocAsync
Using pytorch attention
Python version: 3.12.10 (tags/v3.12.10:0cc8128, Apr 8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]
ComfyUI version: 0.3.34
ComfyUI frontend version: 1.19.9
[Prompt Server] web root: D:\AI\ComfyUI\python_embeded\Lib\site-packages\comfyui_frontend_package\static

Loading: ComfyUI-Manager (V3.32.2)

[ComfyUI-Manager] network_mode: public

ComfyUI Version: v0.3.34-26-gd8e56628 | Released on '2025-05-18'

Import times for custom nodes:
0.0 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\websocket_image_save.py
0.5 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\ComfyUI-Manager

Starting server

To see the GUI go to: http://127.0.0.1:8188
[ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/extension-node-map.json
[ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/alter-list.json
[ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/model-list.json
[ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/github-stats.json
[ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json
FETCH ComfyRegistry Data: 5/85
FETCH ComfyRegistry Data: 10/85
FETCH ComfyRegistry Data: 15/85
FETCH ComfyRegistry Data: 20/85
FETCH ComfyRegistry Data: 25/85
FETCH ComfyRegistry Data: 30/85
FETCH ComfyRegistry Data: 35/85
FETCH ComfyRegistry Data: 40/85
FETCH ComfyRegistry Data: 45/85
FETCH ComfyRegistry Data: 50/85
FETCH ComfyRegistry Data: 55/85
FETCH ComfyRegistry Data: 60/85
FETCH ComfyRegistry Data: 65/85
FETCH ComfyRegistry Data: 70/85
FETCH ComfyRegistry Data: 75/85
FETCH ComfyRegistry Data: 80/85
FETCH ComfyRegistry Data: 85/85
FETCH ComfyRegistry Data [DONE]
[ComfyUI-Manager] default cache updated: https://api.comfy.org/nodes
FETCH DATA from: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json [DONE]
[ComfyUI-Manager] All startup tasks have been completed.
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 9.99k/9.99k [00:00<00:00, 9.73MB/s]
Extracted zip file to D:\AI\ComfyUI\ComfyUI\custom_nodes\agilly1989_motorway

[ComfyUI-Manager] Queued works are completed.
{'install': 1}

After restarting ComfyUI, please refresh the browser.
100%|██████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 3.58M/3.58M [00:00<00:00, 22.6MB/s]
Extracted zip file to D:\AI\ComfyUI\ComfyUI\custom_nodes\rgthree-comfy
Install: pip packages

[ComfyUI-Manager] Queued works are completed.
{'install': 1}

After restarting ComfyUI, please refresh the browser.

---

After the restarting ComfyUI:

(base) D:\AI\ComfyUI>run_nvidia_gpu_fast_fp16_accumulation.bat

(base) D:\AI\ComfyUI>.\python_embeded\python.exe -s ComfyUI\main.py --windows-standalone-build --fast fp16_accumulation
Total VRAM 11264 MB, total RAM 65446 MB
pytorch version: 2.7.0+cu128
Enabled fp16 accumulation.
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 2080 Ti : native
Checkpoint files will always be loaded safely.
Using pytorch attention
[START] Security scan
[DONE] Security scan

ComfyUI-Manager: installing dependencies done.

** ComfyUI startup time: 2025-05-18 19:07:27.829
** Platform: Windows
** Python version: 3.12.10 (tags/v3.12.10:0cc8128, Apr 8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]
** Python executable: D:\AI\ComfyUI\python_embeded\python.exe
** ComfyUI Path: D:\AI\ComfyUI\ComfyUI
** ComfyUI Base Folder Path: D:\AI\ComfyUI\ComfyUI
** User directory: D:\AI\ComfyUI\ComfyUI\user
** ComfyUI-Manager config path: D:\AI\ComfyUI\ComfyUI\user\default\ComfyUI-Manager\config.ini
** Log path: D:\AI\ComfyUI\ComfyUI\user\comfyui.log

Prestartup times for custom nodes:
0.0 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\rgthree-comfy
2.1 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\ComfyUI-Manager
5.8 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\agilly1989_motorway

Python version: 3.12.10 (tags/v3.12.10:0cc8128, Apr 8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]
ComfyUI version: 0.3.34
ComfyUI frontend version: 1.19.9
[Prompt Server] web root: D:\AI\ComfyUI\python_embeded\Lib\site-packages\comfyui_frontend_package\static
D:\AI\ComfyUI\ComfyUI\custom_nodes\rgthree-comfy\py\power_prompt_utils.py:11: SyntaxWarning: invalid escape sequence '\d'
pattern = 'lora:([^:]?)(?::(-?\d(?:.\d*)?))?>'

[rgthree-comfy] Loaded 42 epic nodes. 🎉

Import times for custom nodes:
0.0 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\websocket_image_save.py
0.0 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\agilly1989_motorway
0.1 seconds: D:\AI\ComfyUI\ComfyUI\custom_nodes\rgthree-comfy

Starting server

To see the GUI go to: http://127.0.0.1:8188
got prompt
invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#42'", 'extra_info': {}}

[christian-byrne]

Nice, based on the logs, it looks like you installed manager and then were able to successfully install rgthree custom node. Is that accurate?

[PixelArmony]

Yes, that's correct, Christian. The only issue now is this invalid prompt, as you can see., "Node ID #42"

[christian-byrne]

I believe the issue is that the detection system for missing nodes told you to download agilly1989_motorway, but that was not actually the node pack you needed. The detection system has been fixed to solve this exact issue, but the changes are not deployed quite yet.

In the short-term, can you provide me either the workflow, or the list of node names in the workflow, and I can identify which node was incorrectly identified?

[PixelArmony]

Thanks for your response and help, Christian. I really appreciate it!

I can share the workflow with you, of course, Christian. That said, I believe that I just solved the mystery of 'Node ID #42'. It was simply a missing file location in the "Local Diffusion Model" node. I also created a mklink since I have models in both my Stable Diffusion FORGE and model folders. It would be great if ComfyUI introduced an option to prevent storing large model files twice in separate locations. (Does the 'extra_model_paths.yaml' file in the main ComfyUI folder already handle this? I'm not entirely sure).

Here is the workflow, Christian (which is a beta version, I believe):
CONTROLNET-UPSCALER.json

I hope this helps!
;-)

[christian-byrne]

Nice, I'm glad it was solved. I just tried your workflow and was able to install the missing nodes and execute the graph 👍

[PixelArmony]

Great! It was a pleasure working through these problems with you, Christian.
I really appreciated our conversation. Thank you for your help and support.
Keep up the great work, Christian!

;-)