How To Fix CNV_20000251 - No prefix maintain for external number range &1

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20000 - Messages for fiscal year change

• Message number: 251

• Message text: No prefix maintain for external number range &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20000251 - No prefix maintain for external number range &1 ?

  The SAP error message CNV_20000251 indicates that there is no prefix maintained for an external number range in the system. This error typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
  Cause:
  The error occurs when the system attempts to generate or assign an external number (like a document number) but cannot find a corresponding prefix in the configuration. This can happen if:
  
  The external number range has not been properly defined in the system.
  The prefix for the external number range is missing or incorrectly configured.
  The number range object is not set up correctly in the customizing settings.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Number Range Configuration:
  
  Go to the transaction code SNRO (Number Range Objects).
  Find the relevant number range object that corresponds to the external number range in question.
  Ensure that the number range is defined and that a prefix is maintained.
  
  
  
  Maintain Prefix:
  
  If the prefix is missing, you can add it by selecting the number range and editing the details.
  Make sure to save your changes.
  
  
  
  Check Customizing Settings:
  
  Navigate to the relevant customizing settings for the application or module you are working with.
  Ensure that the external number range is correctly assigned to the relevant document types or processes.
  
  
  
  Test the Configuration:
  
  After making the necessary changes, perform a test to see if the error persists.
  You can try to execute the process that triggered the error again to confirm that it has been resolved.
  
  
  
  Consult Documentation:
  
  If you are unsure about the specific number range object or how to configure it, refer to the SAP documentation or help resources for guidance.
  
  
  
  Contact SAP Support:
  
  If the issue continues after checking the configuration, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  SNRO: Number Range Object Maintenance
  SPRO: Customizing Implementation Guide
  
  
  Documentation: Check SAP Help Portal for detailed information on number range management and data migration processes.
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, ensure that all necessary configurations are completed before starting the migration.
  
  By following these steps, you should be able to resolve the error CNV_20000251 and successfully maintain the external number range in your SAP system.