00165 - Maximum number of users in the system reached

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 165

• Message text: Maximum number of users in the system reached

What causes this issue?

You attempted to log on at the system, but there are too many users.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Make sure that another user logs off so that you can work, or get a
corresponding licence from SAP AG.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 00165 - Maximum number of users in the system reached ?

  The SAP error message "00165 Maximum number of users in the system reached" indicates that the system has reached its limit for concurrent user sessions. This typically occurs when the number of users logged into the SAP system exceeds the maximum number of user sessions allowed by the system configuration.
  Cause:
  
  User Limit Reached: The most common cause is that the maximum number of concurrent user sessions has been reached. This limit is defined in the system profile parameters.
  Configuration Settings: The system may be configured with a specific limit on the number of users that can log in simultaneously.
  Licensing Issues: The number of users may be restricted by the licensing agreement with SAP, which specifies how many users can access the system at the same time.
  Session Management: Users may not be logging out properly, leading to sessions remaining active longer than necessary.
  
  Solution:
  
  
  Increase User Limit:
  
  If you have the necessary permissions, you can increase the maximum number of users allowed in the system by adjusting the profile parameters. This is typically done in the instance profile (e.g., rdisp/mshost and rdisp/max_user).
  You may need to consult with your SAP Basis administrator to make these changes.
  
  
  
  Log Off Inactive Users:
  
  Identify and log off users who are inactive or have left the organization. This can be done using transaction codes like SM04 (User Overview) or AL08 (Global User Overview).
  Administrators can terminate sessions that are no longer needed.
  
  
  
  Review Licensing:
  
  Check your SAP licensing agreement to ensure that you are compliant with the number of users allowed. If necessary, consider upgrading your license to accommodate more users.
  
  
  
  Session Timeout Settings:
  
  Review and adjust session timeout settings to ensure that inactive sessions are terminated after a certain period. This can help free up user slots for new logins.
  
  
  
  Monitor User Activity:
  
  Regularly monitor user activity and session usage to better manage the number of concurrent users and avoid hitting the limit in the future.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or updates related to user limits and session management.
  Documentation: Refer to the SAP Basis documentation for detailed instructions on managing user sessions and system parameters.
  Support: If the issue persists or if you need further assistance, consider reaching out to SAP Support for help.
  
  By following these steps, you should be able to resolve the error and manage user sessions more effectively in your SAP system.