ORA-01008: not all variables bound\n

using ClosedXML.Excel;
using System;
using System.Data.OracleClient;
using MESIntWeb.DataAccess;
 

protected void getExcelFileName()
        {
            DataTable dt = new DataTable();

            dynamic worksheet = 1;
			//filepath on server 
            string[] filename = Directory.GetFiles(@"\\tmpfs\data\insite\QA\BRCM_LotCheck", "*.xlsx");

            foreach (var item in filename)
            {
                Console.WriteLine(Path.GetFileNameWithoutExtension(item));
                using (XLWorkbook workBook = new XLWorkbook(item))
                {
                    //Read the first Sheet from Excel file.
                    IXLWorksheet workSheet = workBook.Worksheet(worksheet);

                    string readRange = "1:1";
                    //Loop through the Worksheet rows.
                    bool firstRow = true;
                    foreach (IXLRow row in workSheet.Rows())
                    {
                        //Use the first row to add columns to DataTable.
                        if (firstRow)
                        {
                            foreach (IXLCell cell in row.Cells(readRange))
                            {
                                dt.Columns.Add(cell.Value.ToString());
                            }
                            //validation on if column value is empty then ignore
                            firstRow = false;
                        }

                        else
                        {
                            int i = 0;
                            DataRow toInsert = dt.NewRow();
                            foreach (IXLCell cell in row.Cells(1, dt.Columns.Count))
                            {
                                try
                                {
                                    toInsert[i] = cell.Value.ToString();
                                }
                                catch (Exception ex)
                                {

                                }
                                i++;
                                //}

                                if (toInsert[0].ToString() != "")
                                {
                                    try
                                {

                                    OracleConnection oc = DBUtility.GetInstance().GetIntConnection();
                                    OracleCommand cmdInsert = oc.CreateCommand();

                                    cmdInsert.CommandText = "INSERT INTO LOT_CHECKING_1 (DATECREATED, DEVICE, LOTID, QTY, FG_PART) VALUES (:DATECREATED, :DEVICE, :LOTID, :QTY, :FG_PART)";
                                        

                                    cmdInsert.Parameters.AddWithValue(":DATECREATED", DATECREATED);
                                    cmdInsert.Parameters.AddWithValue(":DEVICE", DEVICE);
                                    cmdInsert.Parameters.AddWithValue(":LOTID", LOTID);
                                    cmdInsert.Parameters.AddWithValue(":QTY", QTY);
                                    cmdInsert.Parameters.AddWithValue(":FG_PART", FG_PART);

                                    //cmdInsert.Parameters.AddWithValue(":DATECREATED", toInsert[0]);
                                    //cmdInsert.Parameters.AddWithValue(":DEVICE", toInsert[1]);
                                    //cmdInsert.Parameters.AddWithValue(":LOTID", toInsert[2]);
                                    //cmdInsert.Parameters.AddWithValue(":QTY", toInsert[3]);
                                    //cmdInsert.Parameters.AddWithValue(":FG_PART", toInsert[4]);

                                    cmdInsert.ExecuteNonQuery();
                                    LabelBRCM.Text = "Data Sucessfully Uploaded";
                                    }
                                    catch (Exception ex)
                                    {

                                    }
                                    finally
                                    {
                                        DBUtility.GetInstance().CloseConnection();
                                    }
                                    //}
                                }
                            }
                        }
                    }
                    dt.Columns.Clear();
                    LabelBRCM.Text = "File Generated";
                }

            }
        }