Program crashes while trying to load onnx model

[MADHAVAN001]

This behavior is noted in convert_to_caffe2_models.py while trying to load a converted onnx model. The readme documentation was followed up until this point.

model = onnx.load(model_path)
init_net, predict_net = c2.onnx_graph_to_caffe2_net(model)

[mylyu]

to be specific, it actually crashes on
init_net, predict_net = c2.onnx_graph_to_caffe2_net(model)