Problem using timer in code

I'm trying to execute this function in matlab/simulink but the following errors are cropping up:

1. The 'timer' class does not support code generation.
2. Undefined function or variable 'start'.
3. Function 'delete' is not supported for code generation.

I want this program to wait for some time(say 15 sec) after step 1, then execute step 2 and wait again, similarly wait after executing step 3.

function y = fcn(v1, v2, v3, v4)
ar=[v1,v2,v3,v4];
%step1
[~,I]=max(ar);
y=I+1;
t = timer('TimerFcn', 'disp(''wait'')','StartDelay',15);
start t;
delete t;

%step2
y = 1;
t = timer('TimerFcn', 'disp(''wait'')','StartDelay',15);
start t;
delete t;

%step3
[~,I1]=min(ar);
y=I1+1;
t = timer('TimerFcn', 'disp(''wait'')','StartDelay',15);
start t;
delete t;

Answer 1

[Walter Roberson]

You would have to turn off all accleration, in order to turn off code generation.

However, you are using very much the wrong approach.