How To Fix 27090 - Extending/reducing instance & to & identical twins

SAP Error Message - Details

• Message type: E = Error

• Message class: 27 - API-specific configuration/master data messages

• Message number: 090

• Message text: Extending/reducing instance & to & identical twins

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 27090 - Extending/reducing instance & to & identical twins ?

  The SAP error message 27090, which states "Extending/reducing instance & to & identical twins," typically occurs in the context of SAP system landscape management, particularly when dealing with instances in a system landscape (like SAP HANA or SAP S/4HANA). This error indicates that there is an issue with the configuration of instances that are supposed to be identical twins, meaning they should have the same configuration and parameters.
  Cause:
  
  Configuration Mismatch: The instances that are supposed to be identical twins have different configurations or parameters. This could be due to manual changes, incorrect settings during instance creation, or discrepancies in the system landscape.
  System Landscape Issues: There may be issues in the system landscape configuration, such as incorrect transport routes or inconsistencies in the system setup.
  Version Differences: If the instances are running different versions of the software or have different patches applied, this can lead to the error.
  
  Solution:
  
  Check Configuration: Review the configuration settings of both instances to ensure they are identical. This includes checking parameters, profiles, and any custom settings.
  Synchronize Instances: If there are discrepancies, synchronize the configurations of the instances. This may involve copying settings from one instance to another or adjusting parameters to match.
  Review System Landscape: Ensure that the system landscape is correctly configured. Check transport routes and ensure that all instances are properly connected and configured.
  Patch Levels: Verify that both instances are running the same version and patch level of the software. If not, update them to ensure consistency.
  Consult Documentation: Refer to SAP documentation or notes related to this error for specific guidance and troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  System Logs: Review system logs (transaction SM21) for additional error messages or warnings that may provide more context about the issue.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after following these steps, it may be necessary to engage SAP support for further assistance.