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

CNV_20000251 - Overview

• 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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CNV_20000251 - Details

• 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