2017-01-16 14:16:19:028 ERROR: Data.Bars.Load7: System.IO.IOException: The process cannot access the file 'C:\Users\JerryWar\Documents\NinjaTrader 8\db\cache\Nymex Metals - Energy ETH.Eastern Standard Time\TICK\CL 02-17\Tick_6860_1_Last_Close_Tick_Minute_1.Last.ntb' because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.File.InternalDelete(String path, Boolean checkHost)
at NinjaTrader.Data.BarsSeries.Load()
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