"null" while trying to place order

ELLORA
---- This is my code -----

OrderParams orderParams = new OrderParams();
orderParams.quantity = 1;
orderParams.orderType = Constants.ORDER_TYPE_MARKET;
orderParams.tradingsymbol = NSEUniverse.tokenToName.get(token);
orderParams.product = Constants.PRODUCT_CNC;
orderParams.exchange = Constants.EXCHANGE_NSE;
orderParams.transactionType = Constants.TRANSACTION_TYPE_BUY;
orderParams.validity = Constants.VALIDITY_DAY;


-----And this is the exception thrown-----

SHYAMMETL
com.zerodhatech.kiteconnect.kitehttp.exceptions.InputException
null
null
at com.zerodhatech.kiteconnect.kitehttp.KiteResponseHandler.dealWithException(KiteResponseHandler.java:54)
at com.zerodhatech.kiteconnect.kitehttp.KiteResponseHandler.handle(KiteResponseHandler.java:20)
at com.zerodhatech.kiteconnect.kitehttp.KiteRequestHandler.postRequest(KiteRequestHandler.java:86)
at com.zerodhatech.kiteconnect.KiteConnect.placeOrder(KiteConnect.java:319)
at Trader.run(Trader.java:76)
at java.util.TimerThread.mainLoop(Unknown Source)
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