CLMS_TM017 - Multiplex session failed; another multiplex session is currently running

SAP Error Message - Details

• Message type: E = Error

• Message class: CLMS_TM - Message class for the tenant mulitplexer

• Message number: 017

• Message text: Multiplex session failed; another multiplex session is currently running

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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AnswerBot

• What is the cause and solution for SAP error message CLMS_TM017 - Multiplex session failed; another multiplex session is currently running ?

  The SAP error message CLMS_TM017 indicates that a multiplex session has failed because another multiplex session is currently running. This typically occurs in the context of SAP's Transport Management System (TMS) or when using the Change and Transport System (CTS) for managing transports between different SAP systems.
  Cause:
  
  Concurrent Sessions: The error usually arises when a user attempts to start a new multiplex session while another session is already active. SAP does not allow multiple multiplex sessions to run simultaneously to prevent conflicts and ensure data integrity.
  Long-Running Processes: If a previous multiplex session is taking longer than expected to complete, it may block new sessions from starting.
  System Configuration: There may be configuration settings that limit the number of concurrent multiplex sessions.
  
  Solution:
  
  Check Active Sessions: Use transaction code SM50 or SM66 to check for any active processes. Look for any running multiplex sessions and determine if they can be terminated or if they are still needed.
  Wait for Completion: If another multiplex session is running, you may need to wait for it to complete before starting a new one.
  Terminate Stuck Sessions: If a session is stuck or taking too long, you may need to terminate it. Be cautious when doing this, as it can lead to data inconsistencies.
  Review Logs: Check the transport logs for any errors or warnings that might indicate why the previous session is still running.
  Configuration Review: Review the TMS configuration to ensure that it is set up correctly and that there are no restrictions on the number of concurrent sessions.
  System Restart: In some cases, a system restart may be necessary to clear any lingering sessions or processes.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as ST22 (Dump Analysis), SM21 (System Log), and SCC3 (Transport Logs) for further investigation.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. You can search the SAP Support Portal for specific notes that may address this issue.
  Documentation: Review SAP documentation on the Transport Management System for best practices and guidelines on managing multiplex sessions.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP Basis team or SAP support for further assistance.