fp4用controlnet union 确认是官方的fp16，但是一到采样器就会自动退出，感谢大佬

[qiujingjing]

fp4用controlnet union 确认是官方的fp16，但是一到采样器就会自动退出，感谢大佬解答支持

[lmxyy]

What is the error message?

[alloystorm]

I may have the same issue. There's no error message, ComfyUI simply crashes and the UI disconnects. It's the same when running the example script, it crashes when loading the model NunchakuFluxTransformer2dModel.from_pretrained

It takes a few seconds and simply terminates here without any error message.

RTX 5070ti, python 3.11 pytorch 2.7 cuda 12.8

[lmxyy]

I may have the same issue. There's no error message, ComfyUI simply crashes and the UI disconnects. It's the same when running the example script, it crashes when loading the model NunchakuFluxTransformer2dModel.from_pretrained

It takes a few seconds and simply terminates here without any error message.

RTX 5070ti, python 3.11 pytorch 2.7 cuda 12.8

How much RAM do you have? Some potential solutions from the community:

• Try using a different browser.
• Increase your virtual memory allocation.
• Physically add more RAM to your system.
• Download and upgrade VSC++.
• Upgrade CUDA drive.
• Try upgrading your CUDA driver and try setting the environment variable NUNCHAKU_LOAD_METHOD to either READ or READNOPIN.

I’ll go ahead and close this issue for now. If the problem persists or you have any further questions, feel free to open a new one.