Error using nnet.inter​nal.cnn.on​nx.convert​er

I've a pretrained squeeznet model and changed the last layers, and when I try to export my network this error appears Error using nnet.internal.cnn.onnx.onnxmex

Invalid MEX-file

'C:\ProgramData\MATLAB\SupportPackages\R2025b\toolbox\nnet\supportpackages\onnx\+nnet\+internal\+cnn\+onnx\onnxmex.mexw64': No se

encontró el proceso especificado.

Error in

nnet.internal.cnn.onnx.ModelProto/writeToFile (line 66)

ModelPtr = onnxmex(int32(FuncName.EnewModelProto));

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in

nnet.internal.cnn.onnx.exportONNXNetwork (line 23)

writeToFile(modelProto, Filename);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in

exportONNXNetwork (line 7)

nnet.internal.cnn.onnx.exportONNXNetwork(Network, filename, varargin{:});

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

anyone knows how to fix it?

[Walter Roberson]

"No se encontró el proceso especificado." translates to English as "The specified process was not found."

It is not clear to me which process is being referred to.

It might possibly be the case that onnxmex.mexw64 is corrupt and that the Support Package for ONNX needs to be reinstalled.

Answer 1

[Arkadiy Turevskiy]

Hi,

It looks like you are running into the same issue as in this question: https://www.mathworks.com/matlabcentral/answers/494277-onnx-export-yields-error. Please take a look at the answer in that post.

HTH.

Arkadiy