Problem with compiled script [MWMCR::EvaluateFunction error]

I have a script which works 100% from within MATLAB, but as soon as it is run after being compiled, it does not work and I get the following error message:

.. MWMCR::EvaluateFunction error ...

Unable to resolve the name coder.internal.constNonSingletonDim.

... Matlab M-code Stack Trace ...

at

file C:\Program Files\MATLAB\R2019b\mcr\toolbox\signal\signal\goertzel.m, name goertzel, line 54.

I tried the following, but all fails with the same error:

• Compile it as a .net library and run from within a c# application.
• Compile it as a standalone application loading and saving a .mat file to interface with c#.

I believe that the problem lies somewhere within the MATLAB runtime, but I do not have the experience to know where to start to debug this.

I will unfortunately not be able to share the source code.

[CG]

I have the same problem. Whenever I compile a script that uses the goertzel command, I get the error:

"Unable to resolve the name coder.internal.constNonSingletonDim."

It seems to be a general problem.

Answer 1

[Tuba Abbasi]

The root cause of this issue is a set of helper functions which are linked to the "goertzel()" function - coder. Internal.constNonSingletonDim and coder.internal.assertValidDim. These functions were part of a component in R2019b which was not deployable. Our development team is aware of this issue and is working on a fix. In the meantime, please try the following workaround:

1. Launch MATLAB with administrative rights and run the script below first.

destinationFolder=fullfile(matlabroot ,'toolbox','compiler','patch','+coder','+internal');
mkdir(destinationFolder);
source1=which('coder.internal.assertValidDim');
source2=which('coder.internal.constNonSingletonDim');
copyfile(source1, fullfile(destinationFolder, 'assertValidDim.m'),'f');
copyfile(source2, fullfile(destinationFolder, 'constNonSingletonDim.m'),'f');

2. Restart MATLAB with administrative rights. This would ensure that if there are any classes loaded in memory, those are cleared off.

3. Add the %#function pragmas below to help the MATLAB Compiler locate these functions:

%% pragma to help Compiler locate functions
%#function coder.internal.constNonSingletonDim
%#function coder.internal.assertValidDim
%%

For instance, in order to compile the Telephone Keypad Frequencies example in our documentation in MATLAB R2019b, you should add the following lines in the code prior to compiling:

%% pragma to help Compiler locate functions
%#function coder.internal.constNonSingletonDim
%#function coder.internal.assertValidDim
%%
Fs = 8000;
N = 205;
lo = sin(2*pi*697*(0:N-1)/Fs);
hi = sin(2*pi*1209*(0:N-1)/Fs);
data = lo + hi;
f = [697 770 852 941 1209 1336 1477];
freq_indices = round(f/Fs*N) + 1;
dft_data = goertzel(data,freq_indices);
stem(f,abs(dft_data))
ax = gca;
ax.XTick = f;
xlabel('Frequency (Hz)')
title('DFT Magnitude')