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How To Fix SZDM_LOCK816 - MS subsystem separation is not active.


SAP Error Message - Details

  • Message type: E = Error

  • Message class: SZDM_LOCK - To be used for messages due to read only locks

  • Message number: 816

  • Message text: MS subsystem separation is not active.

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  • 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.

    To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

    Unfortunately, there isn't any extra information in this error notice.



    What else can you do?

    First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

    Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

    You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.


Smart SAP Assistant

  • What is the cause and solution for SAP error message SZDM_LOCK816 - MS subsystem separation is not active. ?

    The SAP error message SZDM_LOCK816 indicates that the MS (Message Server) subsystem separation is not active. This error typically arises in a distributed SAP system environment where the Message Server is responsible for managing communication between different application servers.

    Cause:

    The error occurs when the system is configured to use a message server, but the subsystem separation feature is not enabled. Subsystem separation allows for better load balancing and resource management by separating different types of processes (like dialog, background, and update processes) across different application servers.

    Solution:

    To resolve the SZDM_LOCK816 error, you can take the following steps:

    1. Check Configuration:

      • Ensure that the SAP system is configured correctly for subsystem separation. This can be done by checking the instance profile parameters.
    2. Enable Subsystem Separation:

      • You may need to enable subsystem separation in the instance profile. This can typically be done by setting the following parameters in the instance profile:
        • ms/enable_subsystem_separation = 1
      • After making changes to the profile, you will need to restart the SAP system for the changes to take effect.
    3. Review Instance Profiles:

      • Use transaction code RZ10 to edit the instance profile. Look for the parameters related to the message server and subsystem separation.
    4. Check SAP Notes:

      • Search for relevant SAP Notes in the SAP Support Portal that may provide additional guidance or patches related to this error.
    5. Consult Documentation:

      • Review the SAP documentation for your specific version to understand the implications of enabling subsystem separation and any additional configuration that may be required.
    6. System Restart:

      • After making the necessary changes, restart the SAP system to apply the new configuration.

    Related Information:

    • Transaction Codes:

      • RZ10: To maintain instance profiles.
      • RZ11: To check and change profile parameters dynamically.
      • RZ03: To view the system profile parameters.
    • SAP Notes and Documentation:

      • Always refer to the latest SAP Notes for your specific version of SAP, as they may contain important updates or fixes related to this error.
    • Monitoring Tools:

      • Use transaction SM51 to monitor the application servers and ensure that they are communicating properly with the message server.

    If the issue persists after following these steps, it may be beneficial to consult with SAP support or your system administrator for further assistance.

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