How To Fix SZDM_LOCK820 - Activation of MS subsystem separation.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 820

• Message text: Activation of MS subsystem separation.

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_LOCK820 - Activation of MS subsystem separation. ?

  The SAP error message SZDM_LOCK820 typically relates to issues with the activation of the Multi-Subsystem (MS) separation feature in the SAP system. This feature is often used in environments where multiple application servers are involved, and it helps in managing locks and resources more efficiently.
  Cause:
  The error message SZDM_LOCK820 can occur due to several reasons, including:
  
  Configuration Issues: The MS subsystem separation may not be properly configured in the system settings.
  Lock Table Issues: There may be issues with the lock table or lock management in the SAP system.
  System Resource Constraints: Insufficient system resources (like memory or CPU) can lead to problems in activating the subsystem separation.
  Version Compatibility: The version of the SAP system may not support the MS subsystem separation feature, or there may be inconsistencies in the system landscape.
  Transport Issues: If the configuration changes were transported from another system, there may be inconsistencies or missing components.
  
  Solution:
  To resolve the SZDM_LOCK820 error, you can follow these steps:
  
  
  Check Configuration:
  
  Verify the configuration settings for the MS subsystem separation in the SAP system. Ensure that all necessary parameters are correctly set.
  
  
  
  Review Lock Management:
  
  Check the lock table and lock management settings. You can use transaction codes like SM12 to view and manage locks.
  
  
  
  System Resources:
  
  Monitor system resources to ensure that there are sufficient memory and CPU available. You can use transaction ST02 to check for memory issues.
  
  
  
  Check SAP Notes:
  
  Look for relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide fixes or workarounds for known issues.
  
  
  
  System Logs:
  
  Review system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  
  
  Consult Documentation:
  
  Refer to the official SAP documentation for MS subsystem separation to ensure that all prerequisites and configurations are met.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error and the steps you have already taken.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (for lock entries), SM21 (for system logs), and ST02 (for memory management).
  SAP Notes: Regularly check the SAP Support Portal for any updates or notes related to the MS subsystem separation feature.
  System Landscape: Ensure that all systems in your landscape are compatible and properly configured to work with the MS subsystem separation feature.
  
  By following these steps, you should be able to diagnose and resolve the SZDM_LOCK820 error effectively.