Pixal3D Load Model > Loading Sparse Structure model > InvalidHeaderDeserialization

[entropy010]

Hello visualbruno,

I investigated this error in detail to the best of my abilities and can not find the root cause. Maybe you or someone can shed some light why it's happening.

Trellis2 - Sparse Generator:

Loading Sparse Structure model ...
!!! Exception during processing !!! Error while deserializing header: InvalidHeaderDeserialization
--------
execution.py - line 496, 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)
  
execution.py - line 315, 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)

execution.py - line 277, in process_inputs
result = f(**inputs)
--------
custom_nodes\ComfyUI-Trellis2\nodes.py - line 3996, in process
pipeline.load_sparse_structure_model()

custom_nodes\ComfyUI-Trellis2\trellis2\pipelines\trellis2_image_to_3d.py - line 353, in load_sparse_structure_model
self.models['sparse_structure_flow_model'] = models.from_pretrained(f"{self.path}/{self._pretrained_args['models']['sparse_structure_flow_model']}")

custom_nodes\ComfyUI-Trellis2\trellis2\models\__init__.py - line 69, in from_pretrained
model.load_state_dict(load_file(model_file), strict=False)
--------
Lib\site-packages\safetensors\torch.py - line 311, in load_file
with safe_open(filename, framework="pt", device=device) as f:

safetensors_rust.SafetensorError: Error while deserializing header: InvalidHeaderDeserialization

Steps taken so far:
updated to the latest git project state in custom_nodes
Auto-download with huggingface-hub 0.34.4 package installed.
Updated huggingface-hub to 0.36.0 and downloaded TencentARC/Pixal3D HF models manually into ..TencentARC\Pixal3D-T\ckpts
Making sure that ss_flow_img_dit_1_3B_64_bf16.safetensors is not corrupted and the 5.2gb large Pixal3D variant.
Refreshed Sparse Generator and Load Model nodes in the Pixal3D examples workflow.

• Platform: Windows
• Python version: 3.12.0rc3
• Pytorch version: 2.7.0+cu128
• ComfyUI version: 0.3.57
• ComfyUI frontend version: 1.25.11

Trellis.2 works perfectly fine.