PyTorch convert function for op 'index_add_' not implemented.

[lovesunstar]

I tried using convert tools at branch manual-istft-plus-coremltools-7.0, but i got some errors:

Traceback (most recent call last): File "/Users/x/Downloads/spleeter-pytorch-manual-istft-plus-coremltools-7.0/convert-to-coreml", line 59, in main() File "/Users/x/Downloads/spleeter-pytorch-manual-istft-plus-coremltools-7.0/convert-to-coreml", line 43, in main mlmodel = ct.convert( File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/_converters_entry.py", line 551, in convert mlmodel = mil_convert( File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/converter.py", line 188, in mil_convert return _mil_convert(model, convert_from, convert_to, ConverterRegistry, MLModel, compute_units, **kwargs) File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/converter.py", line 212, in _mil_convert proto, mil_program = mil_convert_to_proto( File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/converter.py", line 286, in mil_convert_to_proto prog = frontend_converter(model, **kwargs) File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/converter.py", line 108, in call return load(*args, **kwargs) File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/frontend/torch/load.py", line 75, in load return _perform_torch_convert(converter, debug) File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/frontend/torch/load.py", line 122, in _perform_torch_convert raise e File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/frontend/torch/load.py", line 114, in perform_torch_convert prog = converter.convert() File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/frontend/torch/converter.py", line 484, in convert convert_nodes(self.context, self.graph) File "/Users/x/Library/Python/3.9/lib/python/site-packages/coremltools/converters/mil/frontend/torch/ops.py", line 88, in convert_nodes raise RuntimeError( RuntimeError: PyTorch convert function for op 'index_add' not implemented.