ONNX conversion: No conversion function for op type pick

Hi All,

I’m trying to convert a trained model to ONNX with onnx_mxnet.export_model.
And I get an error : “AttributeError: No conversion function registered for op type pick yet.”
Has anyone successfully solved this problem? Is there any tutorial about registering an operator?

I have Ubuntu18.04, Python 3.8.13, MxNet 1.9.1 and ONNX 1.12.0.
Thanks