How To Fix CNV_20000256 - Prefix &1 was selected for number range number &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20000 - Messages for fiscal year change

• Message number: 256

• Message text: Prefix &1 was selected for number range number &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20000256 - Prefix &1 was selected for number range number &2 ?

  The SAP error message CNV_20000256 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a specific prefix for a number range has been selected, but there may be issues related to the configuration or usage of that number range.
  Cause:
  
  Number Range Configuration: The prefix specified for the number range may not be correctly configured in the system. This could mean that the number range is not defined, or the prefix does not match the expected format.
  Data Migration Issues: During data migration, if the source data uses a different prefix or number range than what is configured in the target system, this error can occur.
  Inconsistent Data: The data being migrated may contain inconsistencies or invalid entries that do not align with the defined number range settings.
  
  Solution:
  
  
  Check Number Range Configuration:
  
  Go to the transaction code SNRO (Number Range Objects) and verify the configuration for the number range object associated with the prefix and number range in question.
  Ensure that the prefix is correctly defined and that the number range is active.
  
  
  
  Adjust Migration Settings:
  
  If you are using a migration tool, check the settings to ensure that the correct prefixes and number ranges are being used.
  Make sure that the source data aligns with the target system's number range configuration.
  
  
  
  Data Validation:
  
  Validate the data being migrated to ensure that it adheres to the expected formats and values for the number range.
  Clean up any inconsistencies in the source data that may lead to this error.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation related to the specific migration or conversion process you are using. There may be specific guidelines or prerequisites that need to be followed.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. They may provide insights specific to your system configuration or the migration process.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SNRO for number range management and SCC1 for client copy, if applicable.
  Migration Cockpit: If using the SAP S/4HANA Migration Cockpit, ensure that you are following the recommended steps and guidelines for data migration.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.