How To Fix /PLMU/UI_GSS026 - Obsolete synchronization units cannot be synchronized

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMU/UI_GSS -

• Message number: 026

• Message text: Obsolete synchronization units cannot be synchronized

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMU/UI_GSS026 - Obsolete synchronization units cannot be synchronized ?

  The SAP error message /PLMU/UI_GSS026 Obsolete synchronization units cannot be synchronized typically occurs in the context of SAP Landscape Management (LaMa) or when dealing with synchronization of system configurations, particularly in a multi-system landscape. This error indicates that there are synchronization units that are considered obsolete and cannot be processed further.
  Cause:
  
  Obsolete Synchronization Units: The error arises when there are synchronization units that have been marked as obsolete. This can happen if the units were previously used for synchronization but are no longer valid due to changes in the system landscape or configuration.
  Configuration Changes: Changes in the system configuration or landscape that render certain synchronization units outdated.
  Incomplete or Failed Synchronization: If a synchronization process was interrupted or failed, it might leave behind obsolete units.
  
  Solution:
  
  Identify Obsolete Units: Use the SAP GUI or relevant transaction codes to identify which synchronization units are marked as obsolete. This may involve checking logs or synchronization status.
  Delete or Archive Obsolete Units: Once identified, you can delete or archive these obsolete synchronization units. This can often be done through the SAP GUI or specific transaction codes related to landscape management.
  Recreate Synchronization Units: If necessary, recreate the synchronization units that are needed for the current configuration.
  Check System Configuration: Ensure that the system configuration is correct and that there are no inconsistencies that could lead to the creation of obsolete units.
  Consult Documentation: Refer to SAP documentation or notes related to landscape management for specific instructions on handling synchronization units.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or patches related to this error.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it impacts critical business processes.
  
  Preventive Measures:
  
  Regularly monitor synchronization processes and logs to catch issues early.
  Maintain documentation of system changes to understand the impact on synchronization units.
  Implement a change management process to ensure that changes in the landscape are well-documented and communicated.
  
  By following these steps, you should be able to resolve the error and prevent it from occurring in the future.