Issue while creating an onnx runtime session

[shinron4]

I am trying to create an onnx runtime session with a model, this mode has symbolic links to some custom operations. While creating the onnx runtime session I am getting the following trace.

File "gen_onnx.py", line 205, in
main()
File "gen_onnx.py", line 192, in main
sess = rt.InferenceSession("Cylinder3d.onnx",so)
File "/local/mnt/workspace/gaursing/Python_ENVS/Cylinder3D_New/lib/python3.8/site-packages/onnxruntime/capi/onnxruntime_inference_collection.py", line 360, in init
self._create_inference_session(providers, provider_options, disabled_optimizers)
File "/local/mnt/workspace/gaursing/Python_ENVS/Cylinder3D_New/lib/python3.8/site-packages/onnxruntime/capi/onnxruntime_inference_collection.py", line 397, in _create_inference_session
sess = C.InferenceSession(session_options, self._model_path, True, self._read_config_from_model)
onnxruntime.capi.onnxruntime_pybind11_state.Fail: [ONNXRuntimeError] : 1 : FAIL : Load model from Cylinder3d.onnx failed:Unsuported type proto value case.

My whole confusion is whether it is something related to the custom operation implementation not registered with the onnx_runtime or is it some issue with the model itself. But I am very sure the issue is later. because if the custom operation is not registered then we get following issue like

onnxruntime.capi.onnxruntime_pybind11_state.Fail: [ONNXRuntimeError] : 1 : FAIL : Load model from centerpoint_voxelnet_experiment_new_test.onnx failed:Fatal error: spconv:SparseConv(-1) is not a registered function/op

Please suggest what could be the problem with here.

[tianleiwu]

@shinron4, Try onnx checker if Cylinder3d.onnx does not contain custom ops.