Same problem here !! Upgrade your TWS and the the probleme is solved !!
> I just upgraded to IB build 880.5 hoping it would fix a BEST query
> error I am having with some ETFs jot back filling. But now it does
> not back fill anything. I get a message that it connected OK but it
> never completes. The connected OK window just keeps blinking on and
> off in about 2 second intervals. After trying for a while I get a
> throttling error. After the delay it starts on the same symbol and
> goes through this all over again. Is anyone else experiencing this?
>
> On symbols, GLD for one, I get a BEST query error and those symbols
> do not back fill either.
>
> Does anyone know of a build that works correctly? IB support seems
> totally oblivious to any problem and have been totally useless.
>
> Any help would be appreciated. Comments such as forget IB and use
> IQfeed would also be welcome at this point. But I would like to use
> free if free will work. But I have been having less and less success
> with IB data feed.
>
> Barry
>
> My setup:
> AB 4.90.5
> IB build 880.5
> Java 1.5.0_14
>
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