Hi Jurgen,
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How does that work when you get no data and no historicalDataEnd() callback? If you have no timeout then your code would just hang wouldn't it?
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I used to download backwards, but it gave me other problems so I reversed it. I always check once I have received the historicalDataEnd() that I received the expected number of bars. So far, I have never had an error for missing bars. (I have a function to manage holidays and short trading days.)
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I must say your delays seem long to me, but I have never checked mine other than they are all less than 15secs (based on my start latch timeout). I only ever got a timeout after 15secs with problems like the one I am facing now with QQQ. I have downloaded hundreds of symbols with long histories of 1min and 5min bars so this is not stated without some experience.
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This is just one of those problems that IB throws at us now and again with data.
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Going to sleep on it. May try using a different timestamp format tomorrow and see if that has any impact. Cannot really think of anything else to try.
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