Exception-on-using-custom-Indicator-in-Blocks

Tried to use custom indicator that I have built in "Building Block" and get the following error messages:


System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')
at System.Collections.Generic.List`1.set_Item(Int32 index, T value)
at WealthLab.MyIndicators.swingLOW.Populate()
at WealthLab.Indicators.IndicatorFactory.ReconcileIndicator(IndicatorBase ib, BarHistory bh, List`1 indicators)
at WealthLab.Indicators.IndicatorFactory.ReconcileDummy(IndicatorBase ib)
at WealthLab.Core.Parameter.GetIndicatorDesc()
at WealthLab.Backtest.LimitStopEntryExit.get_Description()
at WealthLab.Backtest.SellAtLimitStop.get_Description()
at WealthLab8.ucBuildingBlockPanel.ApplyParameters(ParameterList allParameters)
at WealthLab8.BuildingBlockContainer.RemoveBlock(ucBuildingBlockPanel bbp, Boolean applyParameterChanges)
at WealthLab8.ucBuildingBlockPanel.CreateDecorator(Object reference, RoutedEventArgs connection)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.Controls.Primitives.ButtonBase.OnClick()
at System.Windows.Controls.Button.OnClick()
at WealthLab.WPF.WLButton.OnClick()
at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
at System.Windows.Input.InputManager.ProcessStagingArea()
at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)



How can I fix the issue?