Ошибка генерации свечек

10:19:46.548 | Error | StockSharp | System.NullReferenceException: Ссылка на объект не указывает на экземпляр объекта.
в StockSharp.Hydra.CandlesWindow.GetCandles() в c:\stock\stocksharp\dev\Hydra\Hydra\CandlesWindow.xaml.cs:строка 151
в StockSharp.Hydra.CandlesWindow.FindClick(Object sender, RoutedEventArgs e) в c:\stock\stocksharp\dev\Hydra\Hydra\CandlesWindow.xaml.cs:строка 203
в System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
в System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
в System.Windows.Controls.Button.OnClick()
в System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
в System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
в System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
в System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
в System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
в System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
в System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
в System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
в System.Windows.Input.InputManager.ProcessStagingArea()
в System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
в System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
в System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
в System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
в MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
в MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
в System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
в MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)