How To Fix CNV_21527015 - Old and new logical systems &1 are identical

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_21527 - Logical System Rename

• Message number: 015

• Message text: Old and new logical systems &1 are identical

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_21527015 - Old and new logical systems &1 are identical ?

  The SAP error message CNV_21527015 indicates that there is an issue with the logical system configuration during a data migration or system conversion process. Specifically, the error states that the old and new logical systems are identical, which means that the system is trying to map or convert data from one logical system to itself, which is not valid.
  Cause:
  
  
  Identical Logical System Names: The most common cause of this error is that the logical system name for the source (old) and target (new) systems are the same. This can happen if the configuration was not set up correctly or if there was a misunderstanding about the logical system names during the migration process.
  
  
  Configuration Errors: There may be a misconfiguration in the system settings where the logical systems are defined.
  
  
  Data Migration Process: During a data migration or system conversion, if the same logical system is specified for both the source and target, this error will occur.
  
  
  Solution:
  
  
  Check Logical System Configuration:
  
  Go to transaction SCC4 to check the logical system configuration.
  Ensure that the logical system names for the source and target systems are different.
  
  
  
  Update Migration Settings:
  
  If you are using a migration tool or program, review the settings to ensure that the old and new logical systems are correctly specified and are not the same.
  
  
  
  Adjust Mapping:
  
  If you are using a mapping table or configuration file, verify that the mappings for the logical systems are correct and that they point to different logical systems.
  
  
  
  Consult Documentation:
  
  Review the documentation for the migration or conversion process you are following to ensure that you are adhering to the required steps and configurations.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test run of the migration or conversion process to ensure that the error does not occur again.
  
  
  
  Related Information:
  
  Logical Systems: In SAP, logical systems are used to identify different systems in a landscape. Each system should have a unique logical system name.
  Data Migration Tools: If you are using tools like SAP S/4HANA Migration Cockpit or other data migration tools, refer to their specific documentation for handling logical system configurations.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on logical system configurations.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.