Comfy-Org/ComfyUI · error · ValueError

Unsupported file format: '{file_format}'. Only FBX format is

Error message

Unsupported file format: '{file_format}'. Only FBX format is supported.

What it means

Error "Unsupported file format: '{file_format}'. Only FBX format is supported." thrown in Comfy-Org/ComfyUI.

Source

Thrown at comfy_api_nodes/nodes_hunyuan3d.py:559

        model_3d: Types.File3D,
        prompt: str,
        seed: int,
    ) -> IO.NodeOutput:
        _ = seed
        file_format = model_3d.format.lower()
        if file_format != "fbx":
            raise ValueError(f"Unsupported file format: '{file_format}'. Only FBX format is supported.")
        validate_string(prompt, field_name="prompt", min_length=1, max_length=1024)
        model_url = await upload_3d_model_to_comfyapi(cls, model_3d, file_format)
        response = await sync_op(

View on GitHub (pinned to 1c6d8d45b3)

Solutions

1. Request FBX as the output file format.

When it happens

Trigger: Thrown at comfy_api_nodes/nodes_hunyuan3d.py:559 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Comfy-Org/ComfyUI@1c6d8d45b3 (2026-08-14). Data as JSON: /api/errors/534e3d9740046c3b. Report an issue: GitHub.