Error NaN genetic algorithm

Hello everyone, I'm totally new with Matlab.

I'm trying to find the minimum of a system of ode45 with a GA for data fitting. I'm using a time dependent parameters inside the differential equations and I implemented the code following the instruction I found on Mathworks with interp1 function. Once the code is running GA found just an NaN as results; I suspect that the problem is caused by the function interp1 but I do not know how to fix it.

Thank you very much for your time

%flow rates
times=dataPR07(:,3);
Feed=9.936e-05*times.^2+0.01176*times+44.3;
Cfeed=-0.007622*times+5.599;
Harv=0.003716*times+47.81;
%function
function dydt = myode(t,y,times,Feed,Cfeed,Harv,mu_max,Ks,Sr,Vr,B,Sm,Sc,Ysx)
F = interp1(times,Feed,t);
C = interp1(times,Cfeed,t);
H = interp1(times,Harv,t);

    dydt = zeros(2,1);
    dydt(1) =  y(1)*(mu_max*((y(2)/(Ks+y(2))))) -((B+Sr)/Vr)*y(1);
    dydt(2) = (F*Sm+C*Sc)/Vr - y(2)*(H+B+Sr)/Vr - Ysx*(mu_max*((y(2)/(Ks+y(2)))))*y(1);
end