How To Fix SAUNIT_LEGACY_CI554 - Cannot open any more external sessions; &1 &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SAUNIT_LEGACY_CI - Messages for Link from ABAP Unit to Code Inspector

• Message number: 554

• Message text: Cannot open any more external sessions; &1 &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAUNIT_LEGACY_CI554 - Cannot open any more external sessions; &1 &2 ?

  The SAP error message SAUNIT_LEGACY_CI554 with the description "Cannot open any more external sessions; &1 &2" typically indicates that the system has reached the limit of external sessions that can be opened. This can occur in various scenarios, such as when there are too many concurrent connections to the SAP system or when the system configuration limits the number of external sessions.
  Causes:
  
  Session Limit Reached: The maximum number of external sessions allowed by the SAP system has been reached.
  Configuration Settings: The system parameters related to session management may be set too low.
  Resource Exhaustion: The server may be running out of resources (e.g., memory, CPU) to handle additional sessions.
  Long-Running Sessions: There may be long-running or stuck sessions that are not being released properly.
  
  Solutions:
  
  Check Current Sessions: Use transaction codes like SM04 or SM50 to monitor the current sessions and processes. Identify any long-running or inactive sessions that can be terminated.
  Increase Session Limits: If appropriate, consider increasing the session limits in the SAP profile parameters. The relevant parameters include:
  
  rdisp/max_wprun_time: Maximum runtime for a work process.
  rdisp/wp_no_dia: Number of dialog work processes.
  rdisp/wp_no_btc: Number of background work processes.
  rdisp/wp_no_enq: Number of enqueue work processes.
  
  
  Optimize Resource Usage: Review the system's resource usage and optimize it. This may involve tuning the database, adjusting memory settings, or scaling the hardware.
  Session Cleanup: Regularly clean up sessions that are no longer needed. This can be done through transaction SM04 or by implementing a session timeout policy.
  Check for Errors: Review system logs (transaction SM21) for any errors or warnings that might indicate underlying issues affecting session management.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to session management and performance tuning for specific recommendations and best practices.
  Documentation: Refer to the SAP Help Portal for detailed documentation on session management and configuration parameters.
  System Monitoring: Implement monitoring tools to keep track of session usage and system performance to proactively manage session limits.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.