When I try to download them from the historical data manager I get the "unknown instrument (Panic)" error message. When I run a backtest while connected it lists the instrument name.
Attached is a txt file of all of the instruments I can no longer download for some reason. For example, if the symbol is "QQQQ" the error message is "Error on loading chart data for 'QQQQ Default'. Unable to load historical data: unknown instrument." Did these all suddenly get de-listed? I know "QQQQ" is now "QQQ" so that explains that. Did the AMEX do a bulk de-listing last week or something?
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