Failure in user-supplied fitness function evaluation. GA cannot continue.

Hi all,

I was wondering if anyone coud assist me with the following error that I'm receiving in GA, as follows:

   clc
   clear all
   rng default
   
   
   nvars = 24;
   popSize = 48;
   lb=ones(1,nvars);
   lb(1:24) = 1;
   ub = ones(1,nvars);
   ub(1:24) = 24;
   
   
   intCon = 1:24;
   options = optimoptions('ga','UseParallel', true, 'UseVectorized', false, 'PopulationSize', popSize,'PlotFcn',@gaplotrange);
   
   [x,fval,exitflag,output,population,score] = ...
       ga(@objective,nvars,[],[],[],[],lb,ub,[],intCon, options);
   FileName=['_Results_nvars_',num2str(nvars),'_popsize_',num2str(popSize),'_i',num2str(i)];
   save(FileName)
   [Q_Total_cost,Qsystem_total_heat, Qsystem_total_cool] = building_model(x)

While I'm receiving the follwoing errors:

Caused by:

Failure in user-supplied fitness function evaluation. GA cannot continue.

Failure in initial user-supplied fitness function evaluation. GA cannot continue.

Thank you so much in advance!

[Walter Roberson]

The message is saying that objective() applied to the initial population failed.

What does

objective(ones(1,48))

return?

   lb=ones(1,nvars);
   lb(1:24) = 1;

? The lb is already 1 in those positions ?