Order flow vwap can't use in strategy

[AlessioCianini12]

Hi,
I have the lifetime license and I'm trying to use the order flow vwap in my scirpt but it continues to give me an error:
: Error on calling 'OnBarUpdate' method on bar 2519: Object reference not set to an instance of an object.
This is my line of code in which i call the indicator value
double vwapValue = OrderFlowVWAP(VWAPResolution.Standard, TradingHours.String2TradingHours("FDAX"), VWAPStandardDeviations.Three, 1,2,3).VWAP[0];
If i change the name of the insturment in which i want to use the indicator as in the library example it doesn't give me any error.
I'd like the indicator for the FDAX12-21
thanks

[NinjaTrader_ChelseaB]

Hello AlessioCianini12,

May I confirm you have created a custom Trading hour template that you have named FDAX and you are not using the exchange trading hours for the FDAX future which is 'Eurex Equity Index Futures'?

Please provide a screenshot of the custom Trading hours template in the Trading Hours window to confirm.

[AlessioCianini12]

Thank you It wasn't just fdax, have a nice day