I tried IBGateway (latest) and I did not get the Unknown Contract error but it would not load any data before 5th June 2018.
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I completely deleted my TWS and re-installed it, taking care to switch off download layout from server so I had a fresh install. Same situation i.e. no Unknown Contract error, but also no data loading before 5th June 2018. The charts also have the same "break" and missing data before 5th June 2018.
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My reqHistoricalData() is loading 1 day on 1 minute bars. Asking for TRADES and RTH = true and keepUpToDate = FALSE. These parameters work on SPY, DIA and IWM with no problems.
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@Jurgen, what parameters are you using for your reqHistoricalData() call?? Also, do you have any trouble with the QQQ chart before June '18?
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The only other difference I can see is the Windows vs Linux. I can try to run from my Linux environment and see what happens.
