ONNX export yields Error !

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hamed bastami
hamed bastami 2019-12-2
评论： Adrià López Escoriza 2021-4-30
Dear MathWorks Deep Learning Toolbox Team:
Hi, I tried to use exportONNXNetwork, I ran this part of code, but i saw this error, could you help me pls?!
Usage example:
%% Export to ONNX model format
net = squeezenet;
filename = 'squeezenet.onnx';
exportONNXNetwork(net,filename);
-------------------------------------
this error appear:
Error using nnet.internal.cnn.onnx.onnxmex
Invalid MEX-file
'C:\ProgramData\MATLAB\SupportPackages\R2019b\toolbox\nnet\supportpackages\onnx\+nnet\+internal\+cnn\+onnx\onnxmex.mexw64':
A dynamic link library (DLL) initialization routine failed.
Error in nnet.internal.cnn.onnx.ModelProto/writeToFile (line 50)
ModelPtr = onnxmex(int32(FuncName.EnewModelProto));
Error in nnet.internal.cnn.onnx.exportONNXNetwork (line 37)
writeToFile(modelProto, Filename);
Error in exportONNXNetwork (line 40)
nnet.internal.cnn.onnx.exportONNXNetwork(Network, filename, varargin{:});
Error in Untitled (line 5)
exportONNXNetwork(net,filename)
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David
David 2021-4-3
On Mac OS using Matlab 2021a I get:
>> exportONNXNetwork(trainedNetwork_1,'ONNXThumbs.onnx')
Error using nnet.internal.cnn.onnx.onnxmex
Unexpected Standard exception from MEX file.
What() is:Failed to load ONNX Shared library.
..
Error in nnet.internal.cnn.onnx.ModelProto/writeToFile (line 52)
ModelPtr = onnxmex(int32(FuncName.EnewModelProto));
Error in nnet.internal.cnn.onnx.exportONNXNetwork (line 38)
writeToFile(modelProto, Filename);
Error in exportONNXNetwork (line 38)
nnet.internal.cnn.onnx.exportONNXNetwork(Network, filename, varargin{:});
Adrià López Escoriza
Adrià López Escoriza 2021-4-30
Same, the bug report does not seem solve the issue in MacOS

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采纳的回答

Jon Cherrie
Jon Cherrie 2021-4-4
It looks like you are hitting this bug:
There is a workaround listed in that bug report.

更多回答（1 个）

Neelanjana Pal
Neelanjana Pal 2020-2-12
I also got the same issue but restarting the system solved my problem
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Ting Su
Ting Su 2021-3-15
The cause of R2021a is that the bin folder created under C:\ProgramData\MATLAB\SupportPackages\R2021a\bin\win64\ is not recognized as a system path.
The following command should help.
mv C:\ProgramData\MATLAB\SupportPackages\R2021a\bin\win64\onnxpb.dll C:\ProgramData\MATLAB\SupportPackages\R2021a\toolbox\nnet\supportpackages\onnx\+nnet\+internal\+cnn\+onnx\
cui,xingxing
cui,xingxing 2021-3-16
@Ting SuAfter copying onnxpb.dll, it can work now, thank you very much!

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