Load Report Failed

Following document help me to resolve my issue Solve Error
Crystal Report Document needs to be manually disposed.You need to close Report document. It actually creates temprary files in Windows Temp Folder

You should control the lifetime of all Reports in your application and call their Dispose before reaching the 75 limit.

Code:

public ActionResult OccupiedReport() 
    {
        List<ReservationModel.OccupiedStatus> Occupied = new List<ReservationModel.OccupiedStatus>();
        string constr = ConfigurationManager.ConnectionStrings["MyCnn"].ConnectionString;
        using (MySqlConnection con = new MySqlConnection(constr))
        {
            string query = "SELECT * FROM room_status WHERE check_out >= CURDATE() and status ='occupied'";
            using (MySqlCommand cmd = new MySqlCommand(query))
            {
                cmd.Connection = con;
                con.Open();
                using (MySqlDataReader sdr = cmd.ExecuteReader())
                {
                    while (sdr.Read())
                    {
                        Occupied.Add(new ReservationModel.OccupiedStatus
                        {
                            DormName = sdr["Dorm_Name"].ToString(),
                            RoomNumber = sdr["Room_Number"].ToString(),
                            BedNumber = sdr["Bed_Number"].ToString(),
                            GuestName = sdr["Guess_Name"].ToString(),
                            Classification = sdr["Classification"].ToString(),
                            Gender = sdr["Gender"].ToString(),
                            CheckIn = sdr["Check_In"].ToString(),
                            CheckOut = sdr["Check_Out"].ToString(),
                            StatusType = sdr["Status"].ToString()
                        });
                    }

                }
                con.Close();
                ReportDocument rd = new ReportDocument();
                rd.FileName = Server.MapPath("/CrReport/CrystalReport1.rpt");
                rd.Load(Server.MapPath("~/CrReport/CrystalReport1.rpt"));
                rd.SetDataSource(Occupied);

                Response.Buffer = false;
                Response.ClearContent();
                Response.ClearHeaders();


                Stream stream = rd.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
                stream.Seek(0, SeekOrigin.Begin);
                return File(stream, "application/pdf", "CustomerList.pdf");

            }
        }


    } 

ON Server it loads report but after sometime it generate this error.After Restarting IIS Application Error resolve and then it comes again