Unhandled exception: There already is a market data handler subscribed

[adiza0203]

Hey,
I'm trying to work with the NinjaTrader.Client.dll api for my application, but am having issues.
I'm able to setup a single connection, subscribe to market data, and get market data for a specific instrument.
But, when I t try to get data for another instrument, I get this error

How can I handle this? I can't open multiple instances of my application as that also doesn't work. Is the no workaround?
Seems odd I can only look at a single instrument.

Thanks

[NinjaTrader_LuisH]

Hello adiza0203 ,

Thank you for writing in.

There was a similar conversation here:

• https://forum[dot]ninjatrader[dot]com/forum/ninjatrader-8/platform-technical-support-aa/1220436-unhandled-error-there-already-is-a-market-data-handler-subscribed

It looks like unsubscribing to data and resubscribing to data rapidly would be causing this issue.