Interactive Broker connection break mid-way, cause data request stuck in a while loop

Question

terry dylan 2019-1-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/439269-interactive-broker-connection-break-mid-way-cause-data-request-stuck-in-a-while-loop

回答： Annie Leonhart 2020-3-1

I noticed a new problem with IB connection, sometimes when i request data (using either getdata history or timeseries ), the code stuck in the while loop:

while c.DataRequest

drawnow

end

i suspect it happend due to using " ib = ibtws('',7496)" , i may have connect + disconnect from TWS too often ?? Or did i request data too often from TWS ? the only solution to make data request work again, is to quit Matlab, and re-launch Matlab, or re-launch TWS

Anybody experienced the same problem before ?

once " ib = ibtws('',7496)" is established, how long does this connection stay?? how to make sure i keep the connection stay there in practice ?

How to reconnect with IB, without stuck in the data request while loop ?? Please help

Best regards

Terry

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Guillaume 2020-1-23

Peer Boerretzen's non-answer moved here:

Hi I am experiencing exact same problem.

For me it happens when IBTWS automatically restarts every night and matlab get stuck in the while loop you mention when trying to request 'timeseries' data. Have tried with both off-line and on-line version of ibtws and with gateway but same problem.

Would also really apprechiate a solution to this problem

Annie Leonhart 2020-2-8

Download iB Gateway and run it with the log on. Should clearly tell you what’s happening.

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Answer 1

Annie Leonhart 2020-3-1

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/439269-interactive-broker-connection-break-mid-way-cause-data-request-stuck-in-a-while-loop#answer_417957

在 MATLAB Online 中打开

At the end of your code close the connection. It only needs to be open when requesting. If you leave it open it'll timeout and you'll try to request more data with the same client ID and it will not run.

simply add to the end of your code and it'll work smoothly every time.

close(ib)