Cumulative Trades Request error when loading indicator after workspace save or clone chart

The code below in indicator "CumulativeTradesHistoricalSupportTest" will work just fine when the indicator is first loaded on the chart.  But if the workspace is saved and reopened these errors will be sent and the indicator will be removed from the chart.  

The errors will also present themselves if the indicator is added to the chart and then the chart is cloned. The messages below will be sent and the indicator will be removed from the cloned chart. 

#region  CumulativeTradesHistorical (Support Test)
    public class CumulativeTradesHistoricalSupportTest : Indicator
    {
        private int OnceVar = 0, FmVol = 50, ToVol = 9999;
        public CumulativeTradesRequest CumTrd;

        protected override void OnCalculate(int bar, decimal value)
        {
            if (OnceVar == 0)
            {
                DateTime FmDt = DateTime.Now.AddDays(-3);
                DateTime ToDt = DateTime.Now.AddDays(1);
                CumTrd = new ATAS.Indicators.CumulativeTradesRequest(FmDt, ToDt, FmVol, ToVol);
                RequestForCumulativeTrades(CumTrd);
                OnceVar = 1;
            }
        }

        protected override void OnCumulativeTradesResponse(CumulativeTradesRequest InCumTrd, IEnumerable<cumulativetrade> cumulativeTrades)
        {
            base.OnCumulativeTradesResponse(InCumTrd, cumulativeTrades);

            foreach (CumulativeTrade Ct in cumulativeTrades)
            {
                string Rcd = Ct.Time.AddHours(-6) + "," + Ct.Direction.ToString() + "," +
                    Ct.FirstPrice.ToString("0.00") + "," + Ct.Lastprice.ToString("0.00") + "," +
                    Ct.Volume.ToString();
                using (System.IO.StreamWriter file = new System.IO.StreamWriter(@"C:\Temp\ATASv5_Output.csv", true))
                {
                    file.WriteLine(Rcd);
                }
            }

        }
    }

    #endregion