When I run this function, it gives the error "Data 'u_pr' (#427) is inferred as a variable size matrix, while its specified type is something else.". What is the solution for this problem? I will be happy for helps.

function [opt_st, u_pr, y_pr, cv_pr] = fcn( nu, ny, Np)
%#codegen
coder.extrinsic('mpc_ea');
opt_st = zeros(1); u_pr = zeros(nu,Np+1); y_pr = zeros(ny,Np+1); cv_pr =zeros(1);
[opt_st, u_pr, y_pr, cv_pr] = mpc_ea;

Answer 1

[Ryan Livingston]

The variable u_pr is being declared as:

u_pr = zeros(nu,Np+1);

which means that it is variable size since its dimensions depend upon the inputs nu, Np, which are not known until run time.

You need to mark the output signal u_pr as being variable size in the ports and data manager:

http://www.mathworks.com/help/simulink/ug/declare-variable-size-inputs-and-outputs.html

and provide upper bounds for it there.