Duplicate id Error for Multiple Tickers

[mauera]

Hi, when requesting tick data for multiple instruments, how does one specify the same tick type for multiple contracts without getting a duplicate id error?

https://interactivebrokers.github.io/tws-api/tick_types.html

I'm trying to get the model option computation tick types, but they are not returned consistently, if at all.

[mauera]

Answered in other thread. The tickId is functioning similar to reqId, and does not select the tick type, but distinguishes the request. For each contract, use a unique tickId.