ERROR: Connection to NinjaTrader historical market data server lost: The process cannot access the file 'C:\Users\Administrator\Documents\NinjaTrader 7\db\minute\ES 06-12\20120604.Last.ntd' because it is being used by another process.
If I add the indicator while disconnected, there is no error. Also, the indicator appears without an error if the connection is established after adding the indicator. However, if any changes are made to the chart causing the indicator to be refreshed, the error occurs.
The machine in question is running Windows Server 2008 R2. Note that I did not have this problem on my previous machine running Windows Server 2003.
I have not setup any virus scanning or backup software yet, so I don't think it is either of those causing the problem. I've checked, using SysInternals Process Explorer, to see that no other processes have a handle to that file - NinjaTrader is the only one.
The indicator in question is likely adding another data series.
I have uninstalled and reinstalled NinjaTrader and the indicators in question.
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