How To Fix SY605 - No additional external session available for new ABAP Debugger

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 605

• Message text: No additional external session available for new ABAP Debugger

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY605 - No additional external session available for new ABAP Debugger ?

  The SAP error message SY605 ("No additional external session available for new ABAP Debugger") typically occurs when you attempt to start the ABAP Debugger, but the system has reached the limit of external sessions that can be opened for debugging. This can happen in environments where there are restrictions on the number of concurrent sessions or when the system is configured to limit the number of debugging sessions.
  Causes:
  
  Session Limit Reached: The maximum number of external sessions allowed for debugging has been reached. This limit is often set in the SAP system profile parameters.
  User Session Limit: The user may have reached the maximum number of allowed sessions for their user profile.
  System Configuration: The system may be configured to restrict the number of debugging sessions for performance reasons.
  Long-Running Sessions: Existing debugging sessions may not have been closed properly, leading to a buildup of active sessions.
  
  Solutions:
  
  
  Close Existing Debugger Sessions: Check if there are any active debugging sessions that can be closed. You can do this by:
  
  Going to transaction SM04 (User Overview) to see the active sessions for your user.
  Closing any unnecessary sessions.
  
  
  
  Increase Session Limits: If you have the necessary authorizations, you can increase the limits for external sessions:
  
  Check the profile parameters rdisp/wp_no_btc and rdisp/wp_no_enq to see if they can be adjusted.
  You may need to consult with your SAP Basis administrator to make these changes.
  
  
  
  Log Off and Log Back In: Sometimes, simply logging off from the SAP system and logging back in can free up sessions.
  
  
  Check User Profile Settings: Ensure that your user profile settings allow for the required number of sessions. You can check this in transaction SU01 (User Maintenance).
  
  
  System Performance Considerations: If the system is under heavy load, consider optimizing performance or scheduling debugging sessions during off-peak hours.
  
  
  Related Information:
  
  Transaction Codes: 
  
  SM04: User Overview
  SU01: User Maintenance
  RZ10: Profile Parameter Maintenance
  
  
  SAP Notes: Check for any relevant SAP Notes that may address this issue or provide additional guidance.
  Documentation: Review the SAP Help Portal for documentation on session management and debugging in ABAP.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.