Get Margins Failed

Hi,
I'm seeing the following error while fetching the margin amount.

Method: Kite.GetOrderMargins(List)

Params: var orderMargin = new OrderMarginParams {
Exchange = TickerConstants.EXCHANGE_NFO,
OrderType = TickerConstants.ORDER_TYPE_MARKET,
Price = (decimal)vo.LTP,
Product = TickerConstants.PRODUCT_NRML,
Quantity = 25,
TradingSymbol = vo.Scrip,
TransactionType = TickerConstants.TRANSACTION_TYPE_SELL,
Variety = TickerConstants.VARIETY_REGULAR
}

Error: DEBUG: 500 {"status":"error","message":"error computing charges: could not get instrument details : instrument not found: NFO:BANKNIFTY2340641000CE","data":null,"error_type":"GeneralException"}

Checked the instruments file as well, trading symbol BANKNIFTY2340641000CE exists. Kindly revert back asap.

Thanks