clientID clarification

[icecolbeveridge]

Hello,

This is an odd edge case, and it's sort of on the boundary between ibapi and the tws system, but it doesn't seem to be documented clearly anywhere.

I hit a problem where I could connect to the client, but the handshake was timing out; I was able to connect with another script.

The bug turned out to be -- I believe -- that the clientID I was using was too large: in ibapi, it's an int64, but the tws docs only say int.

I don't know whether the correct fix is to use an int32 or to document that using too large a clientID will cause an unexplained failure, but I thought it was worth mentioning.

C

[zbednarke]

Could you try using the biggest int64 and see if it fails?

[icecolbeveridge]

On my machine, using 18446744073709551615 as a clientID fails to complete handshake.

Digging a bit deeper:

• 2147483646 (2^31-2) succeeds
• 2147483647 (2^31-1) fails

On Tue, 12 Sept 2023 at 19:22, zbednarke @.***> wrote:

Could you try using the biggest int64 and see if it fails?

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[hadrianl]

https://github.com/hadrianl/ibapi/blob/4f647c0e9c16555a4a1e6daaab674d8a41206cc4/utils.go#L180C12-L180C12

[hadrianl]

I would fix this latter