How to Preintialize system objects in Matlab Function Blocks of Simulink

Hi guys,

I'm stuck with this issue. I have a typical example where I don't know what data type to use for the preintialisation. I'm using a simple matlab function in simulink model which sends handles of "tcpclient" system object to other matlab function. The script of this function is as follows.

function y = fcn
coder.extrinsic('tcpclient');
y = tcpclient("192.168.0.141",1436);
end

As you can imagine, at the time of compilation Simulink would throw me the following error

Function output 'y' cannot be an mxArray in this context. Consider preinitializing the output variable with a known type.

How would one intialize this type of system objects?

Answer 1

[Shadaab Siddiqie]

Hi, to solve this issue, reinitialize the output variable when using tcpclient function in the MATLAB function. It can be implemented by reinitializing as follows:

function y = fcn
coder.extrinsic('tcpclient');
y = 1; % reinitializing the output variable with a known type
y = tcpclient("192.168.0.141",1436);
end