Why do I get an error when using 'fmincon' in Simulink?

I'm using MATLAB R2021b and try to implement 'fmincon' in MATLAB Function block like below.

x = fmincon(fun,x0,A,b);

However, I get an error when I run simulation.

FMINCON requires 10 input arguments. Pass OPTIMOPTIONS to the solver with property 'Algorithm' set to 'sqp'.

How can I escape the error?

Answer 1

[MathWorks Support Team]

If you use 'fmincon' in MATLAB Function block, you have to write codes in a special manner, because the MATLAB Function block relies on code generation technology.

The limitation is written in this document.

You should set an option and pass 10 arguments to 'fmincon'.

options = optimoptions('fmincon', 'Algorithm', 'sqp');
x = fmincon( fun , x0 , A , b , Aeq , beq , lb , ub , nonlcon , options )

Note:

Additional arguments like Aeq, beq,... can be empty: [].