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# ComfyUI Error Report
## Error Details
- **Node ID:** N/A
- **Node Type:** N/A
- **Exception Type:** Prompt execution failed
- **Exception Message:** Cannot execute because a node is missing the class_type property.: Node ID '#147'
## Stack Trace
```
Error: Prompt execution failed
    at ComfyApi.queuePrompt (http://127.0.0.1:8188/assets/index-azSeANjR.js:4:5485)
    at async ComfyApp.queuePrompt (http://127.0.0.1:8188/assets/index-azSeANjR.js:253:17414)
    at async Proxy.function (http://127.0.0.1:8188/assets/GraphView-CyYDa8uS.js:15:72634)
    at async http://127.0.0.1:8188/assets/index-azSeANjR.js:62:267474
    at async Proxy.execute (http://127.0.0.1:8188/assets/index-azSeANjR.js:62:286967)
    at async queuePrompt (http://127.0.0.1:8188/assets/ComfyQueueButton-BH3dqSji.js:1:3164)
```
## System Information
- **ComfyUI Version:** 0.8.2
- **Arguments:** ComfyUI\main.py --windows-standalone-build --novram
- **OS:** win32
- **Python Version:** 3.13.9 (tags/v3.13.9:8183fa5, Oct 14 2025, 14:09:13) [MSC v.1944 64 bit (AMD64)]
- **Embedded Python:** true
- **PyTorch Version:** 2.9.1+cu130
## Devices

- **Name:** cuda:0 NVIDIA GeForce RTX 4070 Ti : cudaMallocAsync
  - **Type:** cuda
  - **VRAM Total:** 12877955072
  - **VRAM Free:** 11572084736
  - **Torch VRAM Total:** 0
  - **Torch VRAM Free:** 0

## Logs
```
2026-01-13T22:48:24.969377 - Checkpoint files will always be loaded safely.
2026-01-13T22:48:25.107576 - Total VRAM 12281 MB, total RAM 65457 MB
2026-01-13T22:48:25.107720 - pytorch version: 2.9.1+cu130
2026-01-13T22:48:25.108240 - Set vram state to: NO_VRAM
2026-01-13T22:48:25.108601 - Device: cuda:0 NVIDIA GeForce RTX 4070 Ti : cudaMallocAsync
2026-01-13T22:48:25.126288 - Using async weight offloading with 2 streams
2026-01-13T22:48:25.126590 - Enabled pinned memory 29455.0
2026-01-13T22:48:25.129990 - working around nvidia conv3d memory bug.
2026-01-13T22:48:26.392316 - Found comfy_kitchen backend eager: {'available': True, 'disabled': False, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8', 'scaled_mm_nvfp4']}
2026-01-13T22:48:26.392447 - Found comfy_kitchen backend cuda: {'available': True, 'disabled': False, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8', 'scaled_mm_nvfp4']}
2026-01-13T22:48:26.392621 - Found comfy_kitchen backend triton: {'available': False, 'disabled': True, 'unavailable_reason': "ImportError: No module named 'triton'", 'capabilities': []}
2026-01-13T22:48:28.164342 - Using pytorch attention
2026-01-13T22:48:46.964404 - Python version: 3.13.9 (tags/v3.13.9:8183fa5, Oct 14 2025, 14:09:13) [MSC v.1944 64 bit (AMD64)]
2026-01-13T22:48:46.964519 - ComfyUI version: 0.8.2
2026-01-13T22:48:47.025988 - ComfyUI frontend version: 1.35.9
2026-01-13T22:48:47.027232 - [Prompt Server] web root: E:\ComfyUI_windows_portable\python_embeded\Lib\site-packages\comfyui_frontend_package\static
2026-01-13T22:48:47.681013 - Total VRAM 12281 MB, total RAM 65457 MB
2026-01-13T22:48:47.681190 - pytorch version: 2.9.1+cu130
2026-01-13T22:48:47.681564 - Set vram state to: NO_VRAM
2026-01-13T22:48:47.681727 - Device: cuda:0 NVIDIA GeForce RTX 4070 Ti : cudaMallocAsync
2026-01-13T22:48:47.700077 - Using async weight offloading with 2 streams
2026-01-13T22:48:47.700436 - Enabled pinned memory 29455.0
2026-01-13T22:48:48.230087 -
Import times for custom nodes:
2026-01-13T22:48:48.230218 -    0.0 seconds: E:\ComfyUI_windows_portable\ComfyUI\custom_nodes\websocket_image_save.py
2026-01-13T22:48:48.230358 -
2026-01-13T22:48:48.823736 - Context impl SQLiteImpl.
2026-01-13T22:48:48.823865 - Will assume non-transactional DDL.
2026-01-13T22:48:48.824919 - No target revision found.
2026-01-13T22:48:48.890795 - Starting server

2026-01-13T22:48:48.891198 - To see the GUI go to: http://127.0.0.1:8188
2026-01-13T22:54:27.164864 - got prompt
2026-01-13T22:54:27.166670 - invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#147'", 'extra_info': {}}
2026-01-13T22:55:08.789834 - got prompt
2026-01-13T22:55:08.791345 - invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#147'", 'extra_info': {}}
2026-01-13T22:55:45.639230 - got prompt
2026-01-13T22:55:45.640717 - invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#147'", 'extra_info': {}}
2026-01-13T22:56:54.627287 - got prompt
2026-01-13T22:56:54.628834 - invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#147'", 'extra_info': {}}
2026-01-13T22:57:15.198992 - got prompt
2026-01-13T22:57:15.200543 - invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#147'", 'extra_info': {}}
2026-01-13T23:12:21.823780 - got prompt
2026-01-13T23:12:21.825239 - invalid prompt: {'type': 'invalid_prompt', 'message': 'Cannot execute because a node is missing the class_type property.', 'details': "Node ID '#147'", 'extra_info': {}}

```
## 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)