I can close the chart and reopen it and it works fine.
Not sure what process is locking the file.
Any ideas?
Connection to NinjaTrader historical market data server lost: The process cannot access the file 'C:\Users\Gary\Documents\NinjaTrader 7\db\tick\NG 02-10\201001111000.Last.ntd' because it is being used by another process.
Gary

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