[Bug] Audio workflow Tuple index out of range during decode tiled

[christian-byrne]

Expected Behavior

The VAEDecode node was decoding while I was using AceStep to generate music

Actual Behavior

An error occurred. However, while using the workflow, it only happens every once in a while (not consistent error).

  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/comfy/utils.py", line 959, in tiled_scale_multidim
    if feather >= mask.shape[d]:
                  ~~~~~~~~~~^^^
IndexError: tuple index out of range

Steps to Reproduce

Reproduce with this workflow:

tuple-index-out-of-range.json

Debug Logs

Traceback (most recent call last):
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/execution.py", line 347, 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 "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/execution.py", line 222, 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 "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/execution.py", line 194, in _map_node_over_list
    process_inputs(input_dict, i)
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/execution.py", line 183, in process_inputs
    results.append(getattr(obj, func)(**inputs))
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/comfy_extras/nodes_audio.py", line 86, in decode
    audio = vae.decode(samples["samples"]).movedim(-1, 1)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/comfy/sd.py", line 563, in decode
    pixel_samples = self.decode_tiled_(samples_in)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/comfy/sd.py", line 506, in decode_tiled_
    (comfy.utils.tiled_scale(samples, decode_fn, tile_x // 2, tile_y * 2, overlap, upscale_amount = self.upscale_ratio, output_device=self.output_device, pbar = pbar) +
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/comfy/utils.py", line 982, in tiled_scale
    return tiled_scale_multidim(samples, function, (tile_y, tile_x), overlap=overlap, upscale_amount=upscale_amount, out_channels=out_channels, output_device=output_device, pbar=pbar)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/.venv/lib/python3.12/site-packages/torch/utils/_contextlib.py", line 116, in decorate_context
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/home/c_byrne/projects/comfy-testing-environment/ComfyUI/comfy/utils.py", line 959, in tiled_scale_multidim
    if feather >= mask.shape[d]:
                  ~~~~~~~~~~^^^
IndexError: tuple index out of range

Other

• Initial ACE-Step model implementation. #7972

[rickhenderson]

I had this happen to me just now with z_image_turbo. I had used ae.safetensor with qwen 3 CLIP, and it worked fine. When I switched to qwen_ae_safetensor, it failed. Hope that helps.