Unable to get Open Interest

I am unable to get Open Interest data from IB Plugin. The plugin documentation shows that it support Open Interest. But if it showing only 0 when I plot the Open Interest using the supplied AFL for both futures and options. I am attaching the screen shot below. Is there any setting that I need to set or change? FYI, this is NIFTY future listed in NSE India stock exchange. Please help

No Open Interest

Can someone please help me with the issue mentioned above?

OpenInterest for futures from IB is available as real-time quote (current value only) via GetRTData():

IB does not offer historical OI. Historical is needed for chart.

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