Error when converting on matlab coder to cpp

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% spectrogram calculation
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
spec = zeros(winLenHalf+1,numOfFrames);
for i = 1 : numOfFrames
    xi = xPadded(winPos(i):winPos(i) + winLen - 1) .* w;
    if parameter.fftShift == 1
        xi = fftshift(xi);
    end
    Xi = fft(xi);
    spec(:,i) = Xi(1:winLenHalf+1); % This line is occured error when convert to C++.
end

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

I convert to C++ use matlab coder so, occured below error message.

[problem code below]

spec(:,i) = Xi(1:winLenHalf+1);

[error message]

The left-hand side has been constrained to be non-complex, but the right-hand side is complex. To correct this problem, make the right-hand side real using the function REAL, or change the initial assignment to the left-hand side variable to be a complex value using the COMPLEX function.

[question]

How do I convert like a same matlab without loss original wav sound file?

I tried two method in error message but not same convert.

[download source code]

https://www.audiolabs-erlangen.de/resources/MIR/TSMtoolbox/

[madhan ravi]

Try changing the below line from this

 spec = zeros(winLenHalf+1,numOfFrames);

To

 spec = complex(winLenHalf+1,numOfFrames);

[Walter Roberson]

 spec = complex(zeros(winLenHalf+1,numOfFrames));

[멋진남자]

@madhan ravi

spec = complex(winLenHalf+1,numOfFrames);

above code is occured error below

The values cannot be substituted because the size of the left side is 1×1 and the size of the right side is 513×1.

@Walter Roberson

spec = complex(zeros(winLenHalf+1,numOfFrames));

above code is lossed wav sound file.

[멋진남자]

@madhan ravi @Walter Roberson source code download available below

https://www.audiolabs-erlangen.de/resources/MIR/TSMtoolbox/

[멋진남자]

Thank you for @madhan ravi, @Walter Roberson I soved this problem like that your comments.