SAP Knowledge Base Article - Public

3427759 - User Receives a Session Timeout Dump


During the usage of the system, you notice that in some circumstances a user session timeout dump is raised.

The dump popup shows the following message:

"400 Session timed out - please log in again"


SAP Business ByDesign


There are a couple possible causes for a session timeout in the system:

  1. The user is inactive in the system for 1 hour.
  2. The user is using another browser tab with the same tenant in parallel, and closes it. Since the sessions are shared between the tabs, it causes a logoff.
  3. The user may have been manually logged of by a system administrator through the Key User Settings.
  4. There is a difference in timeout parameters for Single Sign-On token renewal (only applicable when using a SSO setup).


Based on the possible causes mentioned, please check the suggestions below to avoid session timeouts:

  1. Ensure that the user is not inactive in the system for a prolonged period of time.
  2. In case parallel operation is required, it is suggested to use the built-in tabs inside the Business ByDesign system itself.
  3. Please check with administrators for the possibility of a manual logoff.
    A manual logoff can be done by an administrator by following the below steps:
    1. Click on the user avatar icon on the top-right of the screen.
    2. Click on Key User Settings.
    3. Click on User Session Settings.
    4. Search for the desired user, and click on the trash bin button.
  4. Please check with your Identity Provider administrator for token renewal timeout parameters.

See Also

1800435 - Changed frontend behavior due to introduced session-timeout (security)

2941957 - Auto Logoff Time Not Respected When Using Single Sign On

3363789 - Dump After Closing Browser Tab


session, business user, logoff, error 500 , KBA , AP-RC-UIF-RT-B , ByD HTML5 Client (not for Cloud for Customer) , Problem


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