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 Recognizing and Preventing Multiple Dialog User LogonsLocate this document in the navigation structure

Use the profile parameter login/disable_multi_gui_login to recognize and prevent multiple user logons under a single user account. As the default configuration, the system informs the user that he or she is already logged on to the system, but allows him or her to proceed.

Note the following:

  • This function applies to dialog logons only. It does not apply to system logons that occur using a Remote Function Call (RFC).
  • It applies to individual user logon IDs (identified by user name and client in the AS ABAP system). For example, a user with accounts in different system clients can still log on to each client, even if you have activated the option to prevent multiple dialog logons.
  • The function is independent of the frontend computer. The system recognizes multiple dialog logon attempts from a single user, regardless of whether the attempts come from a single front end or from different computers.

The following occurs when a user attempts to log on more than once to the AS ABAP system (dialog logon attempt only):

  1. The system informs the user with a dialog box that he or she is already logged on.
  2. The user then has the following choices:
    • He or she can continue with the current logon and end all other user sessions.
    • If multiple logons are allowed, he or she can continue with the current logon and keep the other user sessions. (If multiple logons are not allowed, this option is not offered.)
    • He or she can cancel the current logon attempt.
  3. The user is informed of the consequences of his or her decision:
    • If the user ends existing user sessions, data that has not been saved is lost.
    • If the user continues with his or her current logon attempt without ending existing user sessions, then the system records his or her decision. SAP AG reserves the right to analyze these records.

The default option is to cancel the current logon attempt.

For more information on recognizing and preventing multiple dialog logons, see SAP Note 142724.