@aroonshankar,
Apart from not able to add nifty and banknifty ,the Backfill is not working properly,it deletes the previous data,also it stores only intraday or eod and not both.Say if i back fill 1min 15 day data then the nextday i back fill for the current day ie 1min for 1day then the past 15 day data were gone.so the software must go for a overhaul .
regards,