How to Preintialize system objects in Matlab Function Blocks of Simulink

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BCP
BCP on 18 Aug 2021
Answered: Shadaab Siddiqie on 1 Sep 2021
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?

Answers (1)

Shadaab Siddiqie
Shadaab Siddiqie on 1 Sep 2021
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

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