How To Fix UV031 - Number of users logged on at one time (total across all clients)

SAP Error Message - Details

• Message type: E = Error

• Message class: UV - Measurement of Concurrent Users

• Message number: 031

• Message text: Number of users logged on at one time (total across all clients)

What causes this issue?

This statistic indicates how many users are logged onto the system
concurrently. This is used to determine whether the number of users
exceeds that set by the concurrent user license. The system displays
the total number of concurrent users across all clients.
See also <DS:NA.UV030>Number of concurrent 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?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UV031 - Number of users logged on at one time (total across all clients) ?

  The SAP error message UV031 indicates that the maximum number of users logged on at one time has been exceeded. This is a system limitation that can occur in SAP environments, particularly when the number of concurrent users exceeds the configured limit.
  Cause:
  
  User Limit Exceeded: The primary cause of this error is that the total number of users logged into the SAP system across all clients has surpassed the maximum allowed limit set in the system configuration.
  Configuration Settings: The limit is defined in the SAP system profile parameters, specifically the rdisp/mshost and rdisp/num_abap parameters, which control the number of dialog instances and the maximum number of users.
  High User Demand: A sudden spike in user activity, such as during peak business hours or after a system upgrade, can lead to this error.
  Inactive Sessions: Sometimes, inactive or orphaned sessions may not be released properly, contributing to the user count.
  
  Solution:
  
  
  Increase User Limit:
  
  You can increase the maximum number of users allowed to log in by adjusting the relevant profile parameters in the SAP system. This typically requires access to the SAP system configuration and may involve:
  
  Modifying the rdisp/num_abap parameter to allow more dialog instances.
  Adjusting the rdisp/mshost parameter if necessary.
  
  
  After making changes, you will need to restart the SAP instance for the changes to take effect.
  
  
  
  Monitor User Sessions:
  
  Regularly monitor user sessions to identify and terminate inactive or orphaned sessions. This can be done using transaction codes like SM04 (User Overview) or AL08 (Global User Overview).
  
  
  
  Load Balancing:
  
  If your SAP environment supports it, consider implementing load balancing to distribute user sessions across multiple application servers, which can help manage user load more effectively.
  
  
  
  User Management:
  
  Review user access and ensure that only necessary users have access to the system. Deactivating or limiting access for users who do not need it can help manage the user count.
  
  
  
  Consult SAP Documentation:
  
  Refer to SAP's official documentation or support for specific guidance on adjusting system parameters and best practices for managing user sessions.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or solutions related to user limits and session management.
  System Performance: Keep in mind that increasing the user limit may require additional system resources (CPU, memory) to handle the increased load.
  User Training: Educate users on logging out properly to free up sessions when they are done using the system.
  
  If the problem persists after trying these solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.