How To Fix 00401 - Maximum number of internal sessions reached

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 401

• Message text: Maximum number of internal sessions reached

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 00401 - Maximum number of internal sessions reached ?

  The SAP error message "00401 Maximum number of internal sessions reached" indicates that the system has reached the maximum limit of internal sessions that can be opened for a user. This typically occurs when a user has too many sessions open simultaneously, which can happen due to various reasons, such as not properly closing sessions or a programmatic issue that opens multiple sessions without closing them.
  Causes:
  
  Too Many Open Sessions: The user has opened more sessions than allowed by the system configuration.
  Session Management Issues: Applications or transactions that do not close sessions properly can lead to this error.
  Configuration Limits: The system's configuration may have a low limit set for the maximum number of internal sessions.
  
  Solutions:
  
  
  Close Unused Sessions: The simplest solution is to log off from unused sessions. You can do this by:
  
  Using the transaction code SM04 to view all active sessions for your user and log off from those that are not needed.
  Alternatively, you can use the System menu in the SAP GUI to log off from specific sessions.
  
  
  
  Increase Session Limit: If the issue persists and you frequently need more sessions, consider increasing the session limit:
  
  This can be done by an SAP Basis administrator through the profile parameter rdisp/max_internal_sess. The default value is often set to 6, but it can be increased based on the system's capacity and user needs.
  After changing the parameter, the system may need to be restarted for the changes to take effect.
  
  
  
  Review Custom Code: If you have custom programs or transactions that are opening multiple sessions, review the code to ensure that sessions are being closed properly after their use.
  
  
  User Training: Educate users on best practices for session management, such as logging off from sessions that are no longer needed.
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SM04: To monitor and manage user sessions.
  RZ10: To change profile parameters.
  
  
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to session management.
  
  
  System Performance: Keep in mind that increasing the number of sessions may impact system performance, so it should be done judiciously.
  
  
  By following these steps, you should be able to resolve the "Maximum number of internal sessions reached" error and manage your SAP sessions more effectively.