Can't Start ComfyUI 0.8.25

Desktop Feedback Windows
,
1

Installed new update, restarted, reinstalled, dumped cache, etc.

Still not working, same errors.

What is going on?

This is the Log:

[2026-03-23 05:47:06.354] [info] Adding extra search path custom_nodes C:\Users\Owen\Documents\ComfyUI\custom_nodes
Adding extra search path download_model_base C:\Users\Owen\Documents\ComfyUI\models

[2026-03-23 05:47:06.355] [info] Adding extra search path custom_nodes C:\ComfyUI\resources\ComfyUI\custom_nodes
Setting output directory to: C:\Users\Owen\Documents\ComfyUI\output
Setting input directory to: C:\Users\Owen\Documents\ComfyUI\input
Setting user directory to: C:\Users\Owen\Documents\ComfyUI\user

[2026-03-23 05:47:08.126] [info] [START] Security scan
[DONE] Security scan
** ComfyUI startup time:
[2026-03-23 05:47:08.127] [info] 2026-03-23 05:47:08.126
** Platform: Windows
** Python version: 3.12.9 (main, Feb 12 2025, 14:52:31) [MSC v.1942 64 bit (AMD64)]
** Python executable: C:\Users\Owen\Documents\ComfyUI.venv\Scripts\python.exe
** ComfyUI Path: C:\ComfyUI\resources\ComfyUI
** ComfyUI Base Folder Path: C:\ComfyUI\resources\ComfyUI
** User directory: C:\Users\Owen\Documents\ComfyUI\user
** ComfyUI-Manager config path: C:\Users\Owen\Documents\ComfyUI\user__manager\config.ini
** Log path: C:\Users\Owen\Documents\ComfyUI\user\comfyui.log

[2026-03-23 05:47:09.888] [info] [ComfyUI-Manager] Skipped fixing the ‘comfyui-frontend-package’ dependency because the ComfyUI is outdated.

[2026-03-23 05:47:09.889] [info] [PRE] ComfyUI-Manager

[2026-03-23 05:47:12.682] [info] Found comfy_kitchen backend eager: {‘available’: True, ‘disabled’: False, ‘unavailable_reason’: None, ‘capabilities’: [‘apply_rope’, ‘apply_rope1’, ‘dequantize_mxfp8’, ‘dequantize_nvfp4’, ‘dequantize_per_tensor_fp8’, ‘quantize_mxfp8’, ‘quantize_nvfp4’, ‘quantize_per_tensor_fp8’, ‘scaled_mm_mxfp8’, ‘scaled_mm_nvfp4’]}

[2026-03-23 05:47:12.684] [info] Found comfy_kitchen backend cuda: {‘available’: False, ‘disabled’: True, ‘unavailable_reason’: ‘CUDA not available on this system’, ‘capabilities’: }
Found comfy_kitchen backend triton: {‘available’: False, ‘disabled’: True, ‘unavailable_reason’: “ImportError: No module named ‘triton’”, ‘capabilities’: }

[2026-03-23 05:47:12.688] [info] Checkpoint files will always be loaded safely.

[2026-03-23 05:47:12.717] [error] Traceback (most recent call last):

[2026-03-23 05:47:12.718] [error] File “C:\ComfyUI\resources\ComfyUI\main.py”, line 197, in
import execution
File “C:\ComfyUI\resources\ComfyUI\execution.py”, line 17, in

[2026-03-23 05:47:12.718] [error] import comfy.model_management
File “C:\ComfyUI\resources\ComfyUI\comfy\model_management.py”, line 256, in

[2026-03-23 05:47:12.719] [error] total_vram = get_total_memory(get_torch_device()) / (1024 * 1024)

2026-03-23 05:47:12.719\] \[error

[2026-03-23 05:47:12.720] [error] ^^^^^
[2026-03-23 05:47:12.721] [error] ^^^^^^^^
[2026-03-23 05:47:12.721] [error] ^^^^^
File “C:\ComfyUI\resources\ComfyUI\comfy\model_management.py”, line 206, in get_torch_device

[2026-03-23 05:47:12.722] [error] return torch.device(torch.cuda.current_device())

2026-03-23 05:47:12.722\] \[error

[2026-03-23 05:47:12.723] [error] ^^^^^^^^^^
[2026-03-23 05:47:12.723] [error] ^^^^^^^^^^^^
[2026-03-23 05:47:12.724] [error] ^^^^^
File “C:\Users\Owen\Documents\ComfyUI.venv\Lib\site-packages\torch\cuda_init_.py”, line 1071, in current_device

[2026-03-23 05:47:12.724] [error] lazy_init()
File "C:\Users\Owen\Documents\ComfyUI.venv\Lib\site-packages\torch\cuda_init.py", line 403, in _lazy_init

[2026-03-23 05:47:12.725] [error] raise AssertionError(“Torch not compiled with CUDA enabled”)
AssertionError: Torch not compiled with CUDA enabled

2

Not sure what version of CUDA you’re running, but I had the same “Torch not compiled with CUDA enabled” issue when I installed both ComfyUI 0.8.24 and 0.8.25 while running CUDA 13.1.

I opened a command prompt (run as administrator), navigated to the ComfyUI scripts directory (C:\Users\…\Documents\ComfyUI\.venv\Scripts), and then entered the following:

pip3 uninstall torch torchvision torchaudio

After that’s done, reinstall using:
pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu130

(note that there’s not currently a pytorch cu131, but cu130 seems to be working for me, and ComfyUI is now working)

3

Yes! This worked! I got a lot of warnings, but COMFYUI booted up.

Thank you!

Any idea WHY?

:slight_smile:

Installing collected packages: torchaudio, torch, torchvision
ERROR: pip’s dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
echo-tts 0.1.4 requires torchcodec>=0.8.1, which is not installed.
descript-audiotools 0.7.2 requires protobuf<3.20,>=3.9.2, but you have protobuf 5.29.6 which is incompatible.
vibevoice 0.0.1 requires accelerate==1.6.0, but you have accelerate 1.12.0 which is incompatible.
vibevoice 0.0.1 requires transformers==4.51.3, but you have transformers 4.57.3 which is incompatible.
whisperx 3.7.4 requires torch~=2.8.0, but you have torch 2.11.0+cu130 which is incompatible.
whisperx 3.7.4 requires torchaudio~=2.8.0, but you have torchaudio 2.11.0+cu130 which is incompatible.
Successfully installed torch-2.11.0+cu130 torchaudio-2.11.0+cu130 torchvision-0.26.0+cu130