Troubleshooting
Problem
TM1Web components can no longer be set up on a different domain and work within an external application or custom html page which is using components sourced from TM1Web via iFrame using the TM1Web URL API. Rather than rendering the TM1Web content the iFrame displays a "session timed out" error message.
Symptom
Since February 2020, starting with Chrome, the default behaviour with third-party cookies has changed.
This means that any site that is not in the same domain that wishes to appear in an iFrame, will need to set their cookies as “SameSite=None; Secure” to restore previous functionality.
This behaviour is considered to be a security improvement in the browser. We do not recommend changing the SameSite cookie settings without understanding the risk.
Document Location
Worldwide
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Document Information
Modified date:
09 May 2025
UID
ibm16420157