make sure that the maximum index on a list is less than the list size

hello,

I have this code, which is a Harmony Search Algorithm code, and I integrated it with a data base, but I'm having this error (attached picture) and the full code are below.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Data;
using System.Data.OleDb; 


namespace MultiObjectiveHS
{

    public class CostOptimizer : MOHS.IFunction
    {

        #region Fields

        MOHS hs;
        int nVar;
        double[] xlb;
        double[] xub;
        int Iteration = 0;
        public string address = System.Environment.GetFolderPath(System.Environment.SpecialFolder.DesktopDirectory);
        StreamWriter sw1;
        double[] bestSolution;
        string str1 = DateTime.Now.ToLongDateString();
        string str2 = (DateTime.Now.Hour).ToString();
        string str3 = (DateTime.Now.Minute).ToString();
        string str4 = (DateTime.Now.Second).ToString();
        string name2, name1;
        
        #endregion

        public void Solve()
        {
            name1 = address + "\\Report.txt";

            // Input number of variables (1)
           
            nVar = 2;  // number of variables

            xlb = new double[nVar];
            xub = new double[nVar];


            RunHS();

        }


        public double[] F(double[] x)
        {
            int[] y;
            
            y = new int[x.Length];

            for (int i = 0; i < x.Length; ++i)
            {
                Console.WriteLine(x[i]); 
                y[i] = Convert.ToInt32(x[i]);

            }

            double[][] cost = new double[x.Length][];
             for (int i = 0; i < y.Length; ++i)
            {
                OleDbConnection connect = new OleDbConnection();
                connect.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Dropbox\Bushra\code for test with database\test.accdb;Persist Security Info=False;";
                connect.Open();
                OleDbCommand command = new OleDbCommand();
                command.Connection = connect;
                command.CommandText = "select TC from calculations";
                OleDbDataReader reader = command.ExecuteReader();
                while (reader.Read())
                {
                    Console.Write(reader[0].ToString());
                }
                connect.Close();
                 cost[i] = new double[2];
            }


            double[][] carbonFootprint = new double[x.Length][];
            for (int i = 0; i < carbonFootprint.Length; ++i)
            {
                OleDbConnection connect = new OleDbConnection();
                connect.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Dropbox\Bushra\code for test with database\test.accdb;Persist Security Info=False;";
                connect.Open();
                OleDbCommand command = new OleDbCommand();
                command.Connection = connect;
                command.CommandText = "select TCE from calculations";
                OleDbDataReader reader = command.ExecuteReader();
                while (reader.Read())
                {
                    Console.Write(reader[0].ToString());
                }
                connect.Close();

                carbonFootprint[i] = new double[2];
            }


            double totalPrice = TotalPrice(cost, y);
            double totalCarbonFootprint = TotalCarbonFootprint(carbonFootprint, y);

            double[] f = new double[hs.nObjectives];
            Iteration++;
            try
            {

                f[0] = totalPrice;                // objective 1 
                f[1] = totalCarbonFootprint;     // objective 2 

            }
            catch (Exception e) // in case of error...!
            {
                // Final Outputs
                f[0] = f[1] = double.MaxValue;
                Console.WriteLine(e.Message);
            }

            #region Report

            try
            {
                if (Iteration == 1) { File.Delete(name1); }

                sw1 = File.AppendText(name1);
                sw1.Write(Iteration.ToString() + "\t");
                sw1.Write(f[0].ToString("e") + "\t" + f[1].ToString("e") + "\t");
                for (int i = 0; i < bestSolution.Length - 2; i++)
                    sw1.Write(x[i].ToString() + "\t");
                sw1.WriteLine();
                sw1.Close();

                if (Iteration % 10 == 0)
                    Console.WriteLine("# " + Iteration.ToString() + "  f0 = " + (f[0]).ToString("e") + "  f1 = " + (f[1]).ToString("e"));

                if (Iteration % 50 == 0)
                {
                    hs.choosePareto();
                    Utility.WriteMatrix(hs.ParetoSet, "Pareto Front", "e3");
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }


            #endregion


            return f;
        }

        double TotalPrice(double[][] cost, int[] y)
        {
            double totalPrice = 0;

            for (int i = 0; i < y.Length; ++i)
            {
                Console.WriteLine("y = " + y[i]);
                totalPrice += cost[y[i]][23];
            }

            return totalPrice;
        }


        double TotalCarbonFootprint(double[][] carbonFootprint, int[] y)
        {
            double totalCarbonFootprint = 0;

            for (int i = 0; i < y.Length; ++i)
            {
                totalCarbonFootprint += carbonFootprint[y[i]][23];
            }

            return totalCarbonFootprint;
        }

        public void RunHS()
        {
            
            hs = new MOHS();
            //hs.BW = 5.0e-2;
            hs.nObjectives = 2;   // I HAVE NOT TESTED THIS CODE FOR MORE THAN 2 OBJECTIVES!!!
            hs.isVariableBW = true;
            hs.isVariablePAR = true;
            hs.BWmax = 5e-1;
            hs.BWmin = 5e-3;
            hs.PARmin = .4;
            hs.PARmax = .9;
            hs.NVAR = nVar;
            hs.HMCR = .8;
            hs.HMS = 80;
            hs.maxIter = 10000;
            hs.setBounds(xlb, xub);
            hs.VarType = 0;  // integer   
            //hs.IntegerBW = 1;  // 
            //hs.IntegerPermuteRange = true;
            int[] type = new int[nVar];
            bestSolution = new double[nVar + hs.nObjectives];

            #region SetVariableRange


            type[0] = 0;

            //Input Ranges (2)
            double[] var0 = { 1,2,3,4,5,6,7,8,9,10,11 }; // allowable values for x0
            hs.Ranges.Add(var0);

            type[1] = 0;
            double[] var1 = { 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,23 };
            hs.Ranges.Add(var1);

            //xlb[0] = 0;
            //xub[0] = 0.0001;

            #endregion

            hs.Type = type;
            hs.Solve(this);
        }


      

    }
}

, whatever I changed in this line, it is still there, I couldn't figure what's wrong.

I appreciate your help.

programming is too much for my brain :(