Hi, I use the workflow from the Comfy official youtube channel:
Wan 2.2 Animate - Character Replacement in ComfyUI
And faced with the following issues:
(WF execution log:)
…
WanAnimate: BG images torch.Size([3, 154, 720, 1280]) padded to shape torch.Size([3, 154, 720, 1280])
WanAnimate: Pose images torch.Size([3, 154, 720, 1280]) padded to shape torch.Size([3, 153, 720, 1280])
Sampling 153 frames in 2 windows, at 1280x720 with 4 steps
(hangs out at the end of WanVideo Sampler on the bottom side of the WF) and the error appears:
ImportError: cannot import name ‘triton_key’ from ‘triton.compiler.compiler’ (E:\ComfyUI\Files.venv\Lib\site-packages\triton\compiler\compiler.py)
Set TORCHDYNAMO_VERBOSE=1 for the internal stack trace (please do this especially if you’re reporting a bug to PyTorch). For even more developer context, set TORCH_LOGS=“+dynamo”
Prompt executed in…
Frames 0-77: 0%| | 0/4 [00:02<?, ?it/s]
Grok says:
“The error you’re seeing is a version incompatibility between PyTorch (which uses the Torch Inductor backend for torch.compile acceleration) and your installed Triton package.
Why This Happens:
The triton_key function was added/required in newer versions of Triton (starting around Triton 3.0+ / nightlies in mid-2024 and stabilized in later releases).
Your current Triton version is too old for the PyTorch version you’re running (likely PyTorch 2.4–2.9+ with recent CUDA, common in late-2025 ComfyUI setups).
This exact ImportError: cannot import name ‘triton_key’ from ‘triton.compiler.compiler’ is a very common issue in ComfyUI + WanVideoWrapper (and even base ComfyUI KSamplers) when Triton lags behind PyTorch updates. It’s reported multiple times in the kijai/ComfyUI-WanVideoWrapper repo and ComfyUI issues.”
I have Triton version 3.5.1, so the reason number 2 is not correct.
From the Triton repo:
“Note again that Triton 3.5 only works with PyTorch >= 2.9” .
I had PyTorch 2.8.0+cu129. Valid reason. Need update.
And after an update to PyTorch 2.9.1+cu130
The ComfyUI (0.5.5) can not start:
From Main log: [error] Unhandled exception during server start Error: Python process exited with code 3221226505 and signal null
at ChildProcess. (E:\ComfyUI\resources\app.asar\.vite\build\main.cjs:38258:18)
at ChildProcess.emit (node:events:519:28)
at ChildProcess._handle.onexit (node:internal/child_process:294:12)
…
From Comfy log: [2025-11-20 12:57:40.850] [error] E:\ComfyUI\Files\.venv\Lib\site-packages\timm\models\layers\_init_.py:48: FutureWarning: Importing from timm.models.layers is deprecated, please import via timm.layers
warnings.warn(f"Importing from {_name_} is deprecated, please import via timm.layers", FutureWarning)
[2025-11-20 12:57:40.851] [error] E:\ComfyUI\Files\.venv\Lib\site-packages\timm\models\[registry.py:4](javascript:void(0);): FutureWarning: Importing from timm.models.registry is deprecated, please import via timm.models
warnings.warn(f"Importing from {_name_} is deprecated, please import via timm.models", FutureWarning)
E:\ComfyUI\Files\.venv\Lib\site-packages\timm\models\[helpers.py:7](javascript:void(0);): FutureWarning: Importing from timm.models.helpers is deprecated, please import via timm.models
warnings.warn(f"Importing from {_name_} is deprecated, please import via timm.models", FutureWarning)