is the TAS (Time&Sales) app supported by the SxS API? Can't find it in the documentation.
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It isn't. If an app is not listed in this document, then it's not supported in the sense that it cannot be launched from an application using SxS API.
Error 404 using SxS API.
In your Eikon Side by Side Webinar’s demo you were passing metadata such as trade volume, buy or sell side etc - are there any limits to the data I can pass by this method? (from Webinar Apr 27)
How to link from a News App to a SxS App?
Handshake failed: "Forbidden: No session"
Eikon Desktop and Proxy API running simultaneously with SxS