Raspberry Pi 3 - Camera Face Detection - ??? Build error: C compiler produced errors. See the Build Log for further details.

Dear all,

I am trying to run a standalone application of face detection using a raspberry pi and a camera. I am using the package runOnHardware and during the generation of the C/C++ code I got this error:

>> mypi = raspi('xx.xx.xx.xx','pi','raspberry');
>> runOnHardware(mypi,'faceDetection')
------------------------------------------------------------------------
Function TAR tried to add two files as "types_c.h".
------------------------------------------------------------------------
??? Build error: C compiler produced errors. See the Build Log for further details.

Code generation failed: View Error Report
Error using codegen

Error in runOnHardware (line 52)
codegen('-config ',cfg,fcnName,'-report');

This is my simple faceDetection function:

function faceDetection() 
%#codegen
w = matlab.raspi.webcam(0,[320,240]);
d = matlab.raspi.SDLVideoDisplay;

for k = 1:1000
    img = snapshot(w);   
    fD = vision.CascadeObjectDetector();
    bbox = step(fD, img);
    coder.varsize('bbox',[20 4]);
    imageOut = insertObjectAnnotation(img,'rectangle',bbox,'face');
    displayImage(d,imageOut);
end
release(w);
release(d);

end

Could you please tell me how to solve the problem? Is vision.CascadeObjectDetector System object compatible with such procedure?

Many Thanks in advance.

Ale