Problem with Matlab API Data in c++ project (QtCreator)

Hi,

I am having trouble trying to configure a project in qt creator (version 4.15.1 and 6.2.1 qt framework with MSVC 2019 64 bit compiler) using the matlab api C++. I have compiled a shared library using the Library compiler SDK from Matlab (R2021b). I also have previously succesfully configure the project to use the old version (Matlab API C), using mxarrays and mcl and mlx functions. The project works fine at this point.

I want to upgrade the code to use the modern version of the API for c++, because of some of its features (for example, using asynchronous calls to the library function).

I have added the following lines to my project file (qmake):

# MATLAB API
MATLAB_FOLDER = $$(MATLAB_RUNTIME_FOLDER)

LIBS += -L$$MATLAB_FOLDER/extern/lib/win64/microsoft -llibMatlabCppSharedLib -llibMatlabDataArray
INCLUDEPATH += $$MATLAB_FOLDER/extern/include
DEPENDPATH += $$MATLAB_FOLDER/extern/include

MATLAB_RUNTIME_FOLDER is a system variable where i indicate the path to the matlab runtime folder (version 9.11). I also copied the dlls into my project where the .exe is created. From /v911/runtime/win64 i took libMatlabCppSharedLib9_11.dll and from /v911/extern/bin/win64 libMatlabDataArray.dll.

The initialization of the aplication and the library seems to work fine:

namespace mc = matlab::cpplib;
namespace md = matlab::data;

std::vector<std::u16string> options = { u"-nojvm" };
auto matlab_application = mc::initMATLABApplication(mc::MATLABApplicationMode::IN_PROCESS, options);
auto lib = mc::initMATLABLibrary(matlab_application, u"test.ctf");

The problem lies when I try to declare a factory variable:

md::ArrayFactory factory;

My application launches an exception and i do not know why. Maybe I lack another dependancy ?

[Benjamin Thompson]

Can you post the text or an image of the exception?

[Cristian Ramírez]

Of course.

Answer 1

[Divyanshu]

Hi Cristian,

Please go through the following pointers:

• Ensure that the file 'C:\Program Files\MATLAB\MATLAB Runtime\v911\runtime\win64' is added to the path.
• Launch MATLAB in your system.
• Now build the application with the following command:

        >>mbuild main.cpp

• Execute the application using the command:

        !main.exe

Regards,

Divyanshu