Problem with Genetic algorithm fitness function

Hi everybody I want to use genetic algorithm for optimizing 24 variable. The problem is this:

I implemented the code in this way:

if true
  fitnessfunc=@fitness;
  numberofvariables=24;
  lb=zeros(1,24);
  ub=[350 350 350 350 350 350 350 350 350 350 350 350 51 51 51 51 51 51 51 51 51 51 51 51];
  [x,fval]=gamultiobj(@fitness,numberofvariables,[],[],[],[],lb,ub);

      function C=fitness(Y)
         x0=[3.2*10^5 10^10 0];
         tspan=[0 350];
         [t,y]=ode45(@(t,y) equations(t,y,Y),tspan,x0);
         C=sum(y(:,2).^2)^2+y(350,2)^2+max(y(:,2))^2;
      end

      function dy = equations(t,y,glob)
         %initial parameters value
         dy = zeros(3,1); 
         s=1.3*10^4;
         p=0.1245;
         g=2.019*10^7;
         m=3.422*10^(-10);
         d=0.0412;
         Mmax=50;
         b=2.0*10^(-9);
         a=0.18;
         n=1.01*10^(-7);
         Mth=10;
         w=0.27;
         o=0;
         k=8.4*10^(-3);
         time=glob(1:12);
         u=glob(13:24);
         delta=dirac(t-time)';
         dose=u*delta;
         %E=y1 , t=y2 , m=y3 landa=w
         dy(1) = s+((p*y(1)*y(2))/(g+y(2)))-m*y(1)*y(2)-d*y(1)+o-k*((1-exp(-y(3)))*heaviside(y(3)-Mmax));
         dy(2) = a*y(2)*(1-b*y(2))-n*y(1)*y(2)-k*((y(3)-Mth)*heaviside(y(3)-Mth));
         dy(3) = dose-w*y(3);
      end
  end

I got the error. Is there any suggestion?

Thanks

[Alan Weiss]

Please give us the MATLAB result, I mean the exact error message.

Alan Weiss

MATLAB mathematical toolbox documentation

[mostafa]

if true
  Attempted to access y(350,2); index out of bounds because size(y)=[137,3].

    Error in fitness (line 5)
    C=sum(y(:,2).^2)^2+y(350,2)^2+max(y(:,2))^2;

    Error in createAnonymousFcn>@(x)fcn(x,FcnArgs{:}) (line 11)
    fcn_handle = @(x) fcn(x,FcnArgs{:});

    Error in fcnvectorizer (line 14)
            y(i,:) = feval(fun,(pop(i,:)));

    Error in gamultiobjMakeState (line 52)
            Score =
                                                                 fcnvectorizer(state.Population(initScoreProvided+1:end,:),FitnessFcn,numObj,option    s.SerialUserFcn);

    Error in gamultiobjsolve (line 11)
    state =     gamultiobjMakeState(GenomeLength,FitnessFcn,output.problemtype,options);

    Error in gamultiobj (line 235)
    [x,fval,exitFlag,output,population,scores] = gamultiobjsolve(FitnessFcn,nvars,     ...

    Error in muobga (line 6)
    [x,fval]=gamultiobj(@fitness,numberofvariables,[],[],[],[],lb,ub);

    Caused by:
    Failure in user-supplied fitness function evaluation. GA cannot continue.
  end