Building-Block-hides-exception

The building block "Dynamic Portfolio" (part of the finantic.DynmicPortfolio extension) has a parameter "MinNumTrades".

If this is set to a number smaller than 20 then an exception is thrown during the Initialize phase. The follwing code snippet is generated by "Open as C# Coded Strategy":

CODE:
     
public override void Initialize(BarHistory bars)
        {
         indicator1 = bars.Close;
         indicator2 = new SMA(bars.Close,10);
         PlotIndicator(indicator2,new WLColor(0,0,0));
         _startIndexList.Add(indicator2);
         // Dynamic Portfoilo
         if(dynPf == null)
         {
            // throws exception if MinNumTrades is smaller than 20
            dynPf = new DynamicPortfolio)this, "MyStrategy", "Learning", 250, 250, 25,
               80, 90, 1, "AvgProfitPct");
         }

            foreach(IndicatorBase ib in _startIndexList)
                if (ib.FirstValidIndex > StartIndex)
                    StartIndex = ib.FirstValidIndex;
        }

This exception is displayed when the strategy is run as C# Coded Strategy:


The message does not appear if run as a building block strategy.

Please show exceptions thrown from a building block strategy.