HyVideoSampler 'NoneType' object is not callable

[Lumabrik]

ComfyUI Error Report

Error Details

• Node ID: 3
• Node Type: HyVideoSampler
• Exception Type: TypeError

• Exception Message: 'NoneType' object is not callable

  Stack Trace

  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\execution.py", line 323, in execute
  output_data, output_ui, has_subgraph = get_output_data(obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb)
                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\execution.py", line 198, in get_output_data
  return_values = _map_node_over_list(obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\execution.py", line 169, in _map_node_over_list
  process_inputs(input_dict, i)
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\execution.py", line 158, in process_inputs
  results.append(getattr(obj, func)(**inputs))
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-HunyuanVideoWrapper\nodes.py", line 662, in process
  out_latents = model["pipe"](
                ^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\utils\_contextlib.py", line 116, in decorate_context
  return func(*args, **kwargs)
         ^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-HunyuanVideoWrapper\hyvideo\diffusion\pipelines\pipeline_hunyuan_video.py", line 537, in __call__
  noise_pred = self.transformer(  # For an input image (129, 192, 336) (1, 256, 256)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1736, in _wrapped_call_impl
  return self._call_impl(*args, **kwargs)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1747, in _call_impl
  return forward_call(*args, **kwargs)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-HunyuanVideoWrapper\hyvideo\modules\models.py", line 671, in forward
  img, txt = block(*double_block_args)
             ^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1736, in _wrapped_call_impl
  return self._call_impl(*args, **kwargs)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\python_embeded\Lib\site-packages\torch\nn\modules\module.py", line 1747, in _call_impl
  return forward_call(*args, **kwargs)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-HunyuanVideoWrapper\hyvideo\modules\models.py", line 203, in forward
  attn = attention(
         ^^^^^^^^^^
  
  File "D:\ComfyUIv2\ComfyUI_windows_portable\ComfyUI\custom_nodes\ComfyUI-HunyuanVideoWrapper\hyvideo\modules\attention.py", line 140, in attention
  x = flash_attn_varlen_func(
      ^^^^^^^^^^^^^^^^^^^^^^^

## System Information
- **ComfyUI Version:** v0.3.6-10-gf7695b5
- **Arguments:** ComfyUI\main.py --windows-standalone-build --fast
- **OS:** nt
- **Python Version:** 3.12.7 (tags/v3.12.7:0b05ead, Oct  1 2024, 03:06:41) [MSC v.1941 64 bit (AMD64)]
- **Embedded Python:** true
- **PyTorch Version:** 2.5.1+cu124
## Devices

- **Name:** cuda:0 NVIDIA GeForce RTX 4060 Ti : cudaMallocAsync
  - **Type:** cuda
  - **VRAM Total:** 17175019520
  - **VRAM Free:** 2676515912
  - **Torch VRAM Total:** 13254000640
  - **Torch VRAM Free:** 51930184

## Additional Context
Total VRAM 16379 MB, total RAM 32690 MB
pytorch version: 2.5.1+cu124
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 4060 Ti : cudaMallocAsync
Using pytorch cross attention

[zejacky]

Same here. 'NoneType' object is not callable. using flash_attn (4090, 64GB Ram)

[Lumabrik]

I think it might be to do with not having flash_attn installed. I'm running Comfy portable. I have no idea how to install it, but the version of flash_attn needed is dependant on your cuda and python versions I think ?

[zejacky]

I solved it for me, its running now. I was using the manual from purz: https://purz.notion.site/Get-Windows-Triton-working-for-Mochi-6a0c055e21c84cfba7f1dd628e624e97 Im running comfyui on pytorch version: 2.5.1+cu124 Great work @kijai again!