Can't find the problem attached in code for system control optimization for Genetic Algorithm

    if true
      % code
clear all
close all

global Kp Ki Kd Y T

%ObjectiveFunction = @objective_function_ITAE; %ObjectiveFunction = @objective_function_ISE; %ObjectiveFunction = @objective_function_ITSE; %ObjectiveFunction = @objective_function_MSE;

Fitnessfcn = @objective_function_IAE; nvars = 3;

options = gaoptimset;

options = gaoptimset(options,'PopInitRange',[0; 300]) options = gaoptimset(options,'PopulationSize',[20]) options = gaoptimset(options,'EliteCount',[2]) options = gaoptimset(options,'Generations',[100]) options = gaoptimset(options,'InitialPopulation',[18 12.4100 6.3216]) options = gaoptimset(options,'CreationFcn',@gacreationlinearfeasible) options = gaoptimset(options,'SelectionFcn',@selectiontournament) options = gaoptimset(options,'CrossoverFcn',@crossoversinglepoint)

lb =[0.00; 0.00; 0.00]; ub = [200; 100; 300];

[X,FVAL,REASON,OUTPUT,POPULATION,SCORES] = ga(Fitnessfcn,nvars,... [],[],lb,ub,options);

Kp = X(1); Ki = X(2); Kd = X(3);

sim('model2_opt',T) plot(T,Y) end

if true
  % code
   function IAE = objective_function_IAE(x)

global Kp Ki Kd Y T

Kp = x(1); Ki = x(2); Kd = x(3);

%Integral do Erro Absoluto (IAE) time=0:0.1:20; [T X Y]=sim('dp_pid',time) error = abs(erro)

%IAE (integral of absolute error) IAE=sum(error)

end