How To Fix SZDM_LOCK818 - MS subsytem separation was already activated

SZDM_LOCK818 - Overview

• Message type: E = Error

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

• Message number: 818

• Message text: MS subsytem separation was already activated

Self-Explanatory Message

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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.

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SZDM_LOCK818 - Details

• The SAP error message SZDM_LOCK818 indicates that the MS (Message Server) subsystem separation has already been activated. This error typically arises in the context of SAP systems that are configured for multiple application servers, particularly when there are attempts to activate or modify the configuration related to the message server.
  
  Cause:
  The error occurs when there is an attempt to activate the MS subsystem separation feature in a system where it has already been enabled. This can happen due to:
  
  Configuration Changes: An administrator may have attempted to reconfigure the message server settings without realizing that the subsystem separation was already active.
  System Upgrades or Migrations: During system upgrades or migrations, certain settings may be retained, leading to confusion about the current configuration state.
  Multiple Administrators: If multiple administrators are working on the system, one may activate the feature while another is unaware, leading to conflicting actions.
  
  
  Solution:
  To resolve the SZDM_LOCK818 error, you can follow these