WHY

# ComfyUI Error Report
## Error Details
- **Node ID:** 81
- **Node Type:** KSamplerAdvanced
- **Exception Type:** TypeError
- **Exception Message:** Trying to convert Float8_e4m3fn to the MPS backend but it does not have support for that dtype.

## Stack Trace
```
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 498, in execute
output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, hidden_inputs=hidden_inputs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 316, in get_output_data
return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, hidden_inputs=hidden_inputs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 290, in _async_map_node_over_list
await process_inputs(input_dict, i)

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 278, in process_inputs
result = f(**inputs)
^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/nodes.py", line 1559, in sample
return common_ksampler(model, noise_seed, steps, cfg, sampler_name, scheduler, positive, negative, latent_image, denoise=denoise, disable_noise=disable_noise, start_step=start_at_step, last_step=end_at_step, force_full_denoise=force_full_denoise)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/nodes.py", line 1492, in common_ksampler
samples = comfy.sample.sample(model, noise, steps, cfg, sampler_name, scheduler, positive, negative, latent_image,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/sample.py", line 60, in sample
samples = sampler.sample(noise, positive, negative, cfg=cfg, latent_image=latent_image, start_step=start_step, last_step=last_step, force_full_denoise=force_full_denoise, denoise_mask=noise_mask, sigmas=sigmas, callback=callback, disable_pbar=disable_pbar, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 1163, in sample
return sample(self.model, noise, positive, negative, cfg, self.device, sampler, sigmas, self.model_options, latent_image=latent_image, denoise_mask=denoise_mask, callback=callback, disable_pbar=disable_pbar, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 1053, in sample
return cfg_guider.sample(noise, latent_image, sampler, sigmas, denoise_mask, callback, disable_pbar, seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 1035, in sample
output = executor.execute(noise, latent_image, sampler, sigmas, denoise_mask, callback, disable_pbar, seed, latent_shapes=latent_shapes)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/patcher_extension.py", line 112, in execute
return self.original(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 984, in outer_sample
self.inner_model, self.conds, self.loaded_models = comfy.sampler_helpers.prepare_sampling(self.model_patcher, noise.shape, self.conds, self.model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/sampler_helpers.py", line 130, in prepare_sampling
return executor.execute(model, noise_shape, conds, model_options=model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/patcher_extension.py", line 112, in execute
return self.original(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/sampler_helpers.py", line 138, in _prepare_sampling
comfy.model_management.load_models_gpu([model] + models, memory_required=memory_required + inference_memory, minimum_memory_required=minimum_memory_required + inference_memory)

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_management.py", line 697, in load_models_gpu
loaded_model.model_load(lowvram_model_memory, force_patch_weights=force_patch_weights)

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_management.py", line 506, in model_load
self.model_use_more_vram(use_more_vram, force_patch_weights=force_patch_weights)

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_management.py", line 535, in model_use_more_vram
return self.model.partially_load(self.device, extra_memory, force_patch_weights=force_patch_weights)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 886, in partially_load
raise e

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 883, in partially_load
self.load(device_to, lowvram_model_memory=current_used + extra_memory, force_patch_weights=force_patch_weights, full_load=full_load)

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 716, in load
self.patch_weight_to_device("{}.{}".format(n, param), device_to=device_to)

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 619, in patch_weight_to_device
set_func(out_weight, inplace_update=inplace_update, seed=string_to_seed(key))

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/ops.py", line 452, in set_weight
weight = comfy.float.stochastic_rounding(weight / self.scale_weight.to(device=weight.device, dtype=weight.dtype), self.weight.dtype, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/float.py", line 64, in stochastic_rounding
output[i:i+slice_size].copy_(manual_stochastic_round_to_float8(value[i:i+slice_size], dtype, generator=generator))

```
## System Information
- **ComfyUI Version:** 0.3.67
- **Arguments:** /Applications/ComfyUI.app/Contents/Resources/ComfyUI/main.py --user-directory /Users/paudeldhurbaraj/Documents/ComfyUI/user --input-directory /Users/paudeldhurbaraj/Documents/ComfyUI/input --output-directory /Users/paudeldhurbaraj/Documents/ComfyUI/output --front-end-root /Applications/ComfyUI.app/Contents/Resources/ComfyUI/web_custom_versions/desktop_app --base-directory /Users/paudeldhurbaraj/Documents/ComfyUI --extra-model-paths-config /Users/paudeldhurbaraj/Library/Application Support/ComfyUI/extra_models_config.yaml --log-stdout --listen 127.0.0.1 --port 8000
- **OS:** posix
- **Python Version:** 3.12.11 (main, Aug 18 2025, 19:02:39) [Clang 20.1.4 ]
- **Embedded Python:** false
- **PyTorch Version:** 2.10.0.dev20251119
## Devices

- **Name:** mps
- **Type:** mps
- **VRAM Total:** 68719476736
- **VRAM Free:** 33570340864
- **Torch VRAM Total:** 68719476736
- **Torch VRAM Free:** 33570340864

## Logs
```
2025-11-19T23:12:29.744058 - Adding extra search path custom_nodes /Users/paudeldhurbaraj/Documents/ComfyUI/custom_nodes
2025-11-19T23:12:29.744111 - Adding extra search path download_model_base /Users/paudeldhurbaraj/Documents/ComfyUI/models
2025-11-19T23:12:29.744134 - Adding extra search path custom_nodes /Applications/ComfyUI.app/Contents/Resources/ComfyUI/custom_nodes
2025-11-19T23:12:29.744151 - Setting output directory to: /Users/paudeldhurbaraj/Documents/ComfyUI/output
2025-11-19T23:12:29.744172 - Setting input directory to: /Users/paudeldhurbaraj/Documents/ComfyUI/input
2025-11-19T23:12:29.744182 - Setting user directory to: /Users/paudeldhurbaraj/Documents/ComfyUI/user
2025-11-19T23:12:31.697325 - [START] Security scan2025-11-19T23:12:31.697334 -
2025-11-19T23:12:31.965493 - [DONE] Security scan2025-11-19T23:12:31.965519 -
2025-11-19T23:12:32.083442 - ## ComfyUI-Manager: installing dependencies done.2025-11-19T23:12:32.083492 -
2025-11-19T23:12:32.083515 - ** ComfyUI startup time:2025-11-19T23:12:32.083528 - 2025-11-19T23:12:32.083539 - 2025-11-19 23:12:32.0832025-11-19T23:12:32.083549 -
2025-11-19T23:12:32.083566 - ** Platform:2025-11-19T23:12:32.083576 - 2025-11-19T23:12:32.083586 - Darwin2025-11-19T23:12:32.083596 -
2025-11-19T23:12:32.083607 - ** Python version:2025-11-19T23:12:32.083617 - 2025-11-19T23:12:32.083626 - 3.12.11 (main, Aug 18 2025, 19:02:39) [Clang 20.1.4 ]2025-11-19T23:12:32.083634 -
2025-11-19T23:12:32.083645 - ** Python executable:2025-11-19T23:12:32.083654 - 2025-11-19T23:12:32.083662 - /Users/paudeldhurbaraj/Documents/ComfyUI/.venv/bin/python2025-11-19T23:12:32.083671 -
2025-11-19T23:12:32.083680 - ** ComfyUI Path:2025-11-19T23:12:32.083688 - 2025-11-19T23:12:32.083697 - /Applications/ComfyUI.app/Contents/Resources/ComfyUI2025-11-19T23:12:32.083705 -
2025-11-19T23:12:32.083714 - ** ComfyUI Base Folder Path:2025-11-19T23:12:32.083723 - 2025-11-19T23:12:32.083731 - /Applications/ComfyUI.app/Contents/Resources/ComfyUI2025-11-19T23:12:32.083740 -
2025-11-19T23:12:32.083751 - ** User directory:2025-11-19T23:12:32.083759 - 2025-11-19T23:12:32.083768 - /Users/paudeldhurbaraj/Documents/ComfyUI/user2025-11-19T23:12:32.083776 -
2025-11-19T23:12:32.083787 - ** ComfyUI-Manager config path:2025-11-19T23:12:32.083796 - 2025-11-19T23:12:32.083806 - /Users/paudeldhurbaraj/Documents/ComfyUI/user/default/ComfyUI-Manager/config.ini2025-11-19T23:12:32.083815 -
2025-11-19T23:12:32.083826 - ** Log path:2025-11-19T23:12:32.083836 - 2025-11-19T23:12:32.083845 - /Users/paudeldhurbaraj/Documents/ComfyUI/user/comfyui.log2025-11-19T23:12:32.083853 -
2025-11-19T23:12:32.386099 - [ComfyUI-Manager] Skipped fixing the 'comfyui-frontend-package' dependency because the ComfyUI is outdated.
2025-11-19T23:12:32.386436 -
Prestartup times for custom nodes:
2025-11-19T23:12:32.386484 - 2.6 seconds: /Applications/ComfyUI.app/Contents/Resources/ComfyUI/custom_nodes/ComfyUI-Manager
2025-11-19T23:12:32.386511 -
2025-11-19T23:12:38.491911 - Checkpoint files will always be loaded safely.
2025-11-19T23:12:38.640348 - Total VRAM 65536 MB, total RAM 65536 MB
2025-11-19T23:12:38.640427 - pytorch version: 2.10.0.dev20251119
2025-11-19T23:12:38.641555 - Mac Version (15, 7, 2)
2025-11-19T23:12:38.641712 - Set vram state to: SHARED
2025-11-19T23:12:38.641770 - Device: mps
2025-11-19T23:12:55.225357 - Using sub quadratic optimization for attention, if you have memory or speed issues try using: --use-split-cross-attention
2025-11-19T23:13:11.902962 - Python version: 3.12.11 (main, Aug 18 2025, 19:02:39) [Clang 20.1.4 ]
2025-11-19T23:13:11.903031 - ComfyUI version: 0.3.67
2025-11-19T23:13:11.904187 - [Prompt Server] web root: /Applications/ComfyUI.app/Contents/Resources/ComfyUI/web_custom_versions/desktop_app
2025-11-19T23:13:13.592308 - ### Loading: ComfyUI-Manager (V3.36)
2025-11-19T23:13:13.592523 - [ComfyUI-Manager] network_mode: public
2025-11-19T23:13:13.592649 - ### ComfyUI Revision: UNKNOWN (The currently installed ComfyUI is not a Git repository)
2025-11-19T23:13:13.600540 -
Import times for custom nodes:
2025-11-19T23:13:13.600597 - 0.0 seconds: /Applications/ComfyUI.app/Contents/Resources/ComfyUI/custom_nodes/websocket_image_save.py
2025-11-19T23:13:13.600625 - 0.0 seconds: /Applications/ComfyUI.app/Contents/Resources/ComfyUI/custom_nodes/ComfyUI-Manager
2025-11-19T23:13:13.600649 -
2025-11-19T23:13:14.861713 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/model-list.json
2025-11-19T23:13:14.865994 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/alter-list.json
2025-11-19T23:13:15.004270 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json
2025-11-19T23:13:15.029167 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/github-stats.json
2025-11-19T23:13:15.137636 - [ComfyUI-Manager] default cache updated: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/extension-node-map.json
2025-11-19T23:13:15.555622 - Failed to initialize database. Please ensure you have installed the latest requirements. If the error persists, please report this as in future the database will be required: (sqlite3.OperationalError) unable to open database file
(Background on this error at: https://sqlalche.me/e/20/e3q8)
2025-11-19T23:13:15.560293 - Starting server

2025-11-19T23:13:15.560539 - To see the GUI go to: http://127.0.0.1:8000
2025-11-19T23:13:17.067982 - comfyui-frontend-package not found in requirements.txt
2025-11-19T23:13:17.278137 - [DEPRECATION WARNING] Detected import of deprecated legacy API: /scripts/ui.js. This is likely caused by a custom node extension using outdated APIs. Please update your extensions or contact the extension author for an updated version.
2025-11-19T23:13:17.279706 - [DEPRECATION WARNING] Detected import of deprecated legacy API: /extensions/core/groupNode.js. This is likely caused by a custom node extension using outdated APIs. Please update your extensions or contact the extension author for an updated version.
2025-11-19T23:13:17.540889 - comfyui-frontend-package not found in requirements.txt
2025-11-19T23:13:17.619723 - [DEPRECATION WARNING] Detected import of deprecated legacy API: /scripts/ui/components/buttonGroup.js. This is likely caused by a custom node extension using outdated APIs. Please update your extensions or contact the extension author for an updated version.
2025-11-19T23:13:17.621349 - [DEPRECATION WARNING] Detected import of deprecated legacy API: /scripts/ui/components/button.js. This is likely caused by a custom node extension using outdated APIs. Please update your extensions or contact the extension author for an updated version.
2025-11-19T23:13:18.709918 - FETCH ComfyRegistry Data: 5/1072025-11-19T23:13:18.710098 -
2025-11-19T23:13:22.962444 - FETCH ComfyRegistry Data: 10/1072025-11-19T23:13:22.962519 -
2025-11-19T23:13:27.867467 - FETCH ComfyRegistry Data: 15/1072025-11-19T23:13:27.867594 -
2025-11-19T23:13:31.921626 - FETCH ComfyRegistry Data: 20/1072025-11-19T23:13:31.921717 -
2025-11-19T23:13:35.875078 - FETCH ComfyRegistry Data: 25/1072025-11-19T23:13:35.875164 -
2025-11-19T23:13:39.855663 - FETCH ComfyRegistry Data: 30/1072025-11-19T23:13:39.855752 -
2025-11-19T23:13:43.888362 - FETCH ComfyRegistry Data: 35/1072025-11-19T23:13:43.888452 -
2025-11-19T23:13:48.073539 - FETCH ComfyRegistry Data: 40/1072025-11-19T23:13:48.073623 -
2025-11-19T23:13:51.914616 - FETCH ComfyRegistry Data: 45/1072025-11-19T23:13:51.914688 -
2025-11-19T23:13:56.401841 - FETCH ComfyRegistry Data: 50/1072025-11-19T23:13:56.401934 -
2025-11-19T23:14:01.617632 - FETCH ComfyRegistry Data: 55/1072025-11-19T23:14:01.617725 -
2025-11-19T23:14:05.762843 - FETCH ComfyRegistry Data: 60/1072025-11-19T23:14:05.762920 -
2025-11-19T23:14:09.963449 - FETCH ComfyRegistry Data: 65/1072025-11-19T23:14:09.963523 -
2025-11-19T23:14:14.131409 - FETCH ComfyRegistry Data: 70/1072025-11-19T23:14:14.131523 -
2025-11-19T23:14:18.083418 - FETCH ComfyRegistry Data: 75/1072025-11-19T23:14:18.083514 -
2025-11-19T23:14:22.945687 - FETCH ComfyRegistry Data: 80/1072025-11-19T23:14:22.945785 -
2025-11-19T23:14:27.290367 - FETCH ComfyRegistry Data: 85/1072025-11-19T23:14:27.290466 -
2025-11-19T23:14:31.606029 - FETCH ComfyRegistry Data: 90/1072025-11-19T23:14:31.606117 -
2025-11-19T23:14:35.700072 - FETCH ComfyRegistry Data: 95/1072025-11-19T23:14:35.700214 -
2025-11-19T23:14:40.546739 - FETCH ComfyRegistry Data: 100/1072025-11-19T23:14:40.546836 -
2025-11-19T23:14:45.638805 - FETCH ComfyRegistry Data: 105/1072025-11-19T23:14:45.638883 -
2025-11-19T23:14:47.843842 - FETCH ComfyRegistry Data [DONE]2025-11-19T23:14:47.844124 -
2025-11-19T23:14:47.956318 - [ComfyUI-Manager] default cache updated: https://api.comfy.org/nodes
2025-11-19T23:14:47.961028 - FETCH DATA from: https://raw.githubusercontent.com/ltdrdata/ComfyUI-Manager/main/custom-node-list.json2025-11-19T23:14:47.961050 - 2025-11-19T23:14:48.227377 - [DONE]2025-11-19T23:14:48.227476 -
2025-11-19T23:14:48.274294 - [ComfyUI-Manager] All startup tasks have been completed.
2025-11-20T01:17:46.491181 - got prompt
2025-11-20T01:17:46.503228 - VAE load device: mps, offload device: cpu, dtype: torch.bfloat16
2025-11-20T01:17:46.537991 - Using scaled fp8: fp8 matrix mult: False, scale input: False
2025-11-20T01:17:46.879753 - Requested to load WanTEModel
2025-11-20T01:17:46.884179 - loaded completely 9.5367431640625e+25 6419.477203369141 True
2025-11-20T01:17:46.885642 - CLIP/text encoder model load device: cpu, offload device: cpu, current: cpu, dtype: torch.float16
2025-11-20T01:18:00.541808 - Using scaled fp8: fp8 matrix mult: False, scale input: True
2025-11-20T01:18:00.556125 - model weight dtype torch.float16, manual cast: None
2025-11-20T01:18:00.556322 - model_type FLOW
2025-11-20T01:18:08.652790 - Requested to load WAN21
2025-11-20T01:18:08.653145 - 0 models unloaded.
2025-11-20T01:18:09.797485 - !!! Exception during processing !!! Trying to convert Float8_e4m3fn to the MPS backend but it does not have support for that dtype.
2025-11-20T01:18:09.809485 - Traceback (most recent call last):
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 498, in execute
output_data, output_ui, has_subgraph, has_pending_tasks = await get_output_data(prompt_id, unique_id, obj, input_data_all, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, hidden_inputs=hidden_inputs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 316, in get_output_data
return_values = await _async_map_node_over_list(prompt_id, unique_id, obj, input_data_all, obj.FUNCTION, allow_interrupt=True, execution_block_cb=execution_block_cb, pre_execute_cb=pre_execute_cb, hidden_inputs=hidden_inputs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 290, in _async_map_node_over_list
await process_inputs(input_dict, i)
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/execution.py", line 278, in process_inputs
result = f(**inputs)
^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/nodes.py", line 1559, in sample
return common_ksampler(model, noise_seed, steps, cfg, sampler_name, scheduler, positive, negative, latent_image, denoise=denoise, disable_noise=disable_noise, start_step=start_at_step, last_step=end_at_step, force_full_denoise=force_full_denoise)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/nodes.py", line 1492, in common_ksampler
samples = comfy.sample.sample(model, noise, steps, cfg, sampler_name, scheduler, positive, negative, latent_image,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/sample.py", line 60, in sample
samples = sampler.sample(noise, positive, negative, cfg=cfg, latent_image=latent_image, start_step=start_step, last_step=last_step, force_full_denoise=force_full_denoise, denoise_mask=noise_mask, sigmas=sigmas, callback=callback, disable_pbar=disable_pbar, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 1163, in sample
return sample(self.model, noise, positive, negative, cfg, self.device, sampler, sigmas, self.model_options, latent_image=latent_image, denoise_mask=denoise_mask, callback=callback, disable_pbar=disable_pbar, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 1053, in sample
return cfg_guider.sample(noise, latent_image, sampler, sigmas, denoise_mask, callback, disable_pbar, seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 1035, in sample
output = executor.execute(noise, latent_image, sampler, sigmas, denoise_mask, callback, disable_pbar, seed, latent_shapes=latent_shapes)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/patcher_extension.py", line 112, in execute
return self.original(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/samplers.py", line 984, in outer_sample
self.inner_model, self.conds, self.loaded_models = comfy.sampler_helpers.prepare_sampling(self.model_patcher, noise.shape, self.conds, self.model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/sampler_helpers.py", line 130, in prepare_sampling
return executor.execute(model, noise_shape, conds, model_options=model_options)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/patcher_extension.py", line 112, in execute
return self.original(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/sampler_helpers.py", line 138, in _prepare_sampling
comfy.model_management.load_models_gpu([model] + models, memory_required=memory_required + inference_memory, minimum_memory_required=minimum_memory_required + inference_memory)
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_management.py", line 697, in load_models_gpu
loaded_model.model_load(lowvram_model_memory, force_patch_weights=force_patch_weights)
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_management.py", line 506, in model_load
self.model_use_more_vram(use_more_vram, force_patch_weights=force_patch_weights)
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_management.py", line 535, in model_use_more_vram
return self.model.partially_load(self.device, extra_memory, force_patch_weights=force_patch_weights)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 886, in partially_load
raise e
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 883, in partially_load
self.load(device_to, lowvram_model_memory=current_used + extra_memory, force_patch_weights=force_patch_weights, full_load=full_load)
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 716, in load
self.patch_weight_to_device("{}.{}".format(n, param), device_to=device_to)
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/model_patcher.py", line 619, in patch_weight_to_device
set_func(out_weight, inplace_update=inplace_update, seed=string_to_seed(key))
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/ops.py", line 452, in set_weight
weight = comfy.float.stochastic_rounding(weight / self.scale_weight.to(device=weight.device, dtype=weight.dtype), self.weight.dtype, seed=seed)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Applications/ComfyUI.app/Contents/Resources/ComfyUI/comfy/float.py", line 64, in stochastic_rounding
output[i:i+slice_size].copy_(manual_stochastic_round_to_float8(value[i:i+slice_size], dtype, generator=generator))
TypeError: Trying to convert Float8_e4m3fn to the MPS backend but it does not have support for that dtype.

2025-11-20T01:18:09.812736 - Prompt executed in 23.32 seconds

```
## Attached Workflow
Please make sure that workflow does not contain any sensitive information such as API keys or passwords.
```
Workflow too large. Please manually upload the workflow from local file system.
```

## Additional Context
(Please add any additional context or steps to reproduce the error here)