How To Fix CNV_00001264 - All source tables are mapped to exactly one target table

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_00001 - Message class for CWB settings maintenance programs

• Message number: 264

• Message text: All source tables are mapped to exactly one target table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_00001264 - All source tables are mapped to exactly one target table ?

  The SAP error message CNV_00001264 indicates that during a data migration or conversion process, all source tables have been mapped to exactly one target table. This situation typically arises in the context of SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data conversion scenarios.
  Cause:
  
  Mapping Configuration: The error usually occurs when the mapping configuration for the data migration is set up incorrectly. It suggests that the source tables are not properly defined to map to multiple target tables, or the mapping logic is too restrictive.
  Data Model Changes: If there have been changes in the data model (e.g., during an upgrade or migration), the existing mappings may no longer be valid or optimal.
  Inadequate Source Data: The source data might not have the necessary structure or content to be distributed across multiple target tables.
  
  Solution:
  
  Review Mapping Configuration: Check the mapping configuration in the migration tool. Ensure that the source tables are correctly mapped to the appropriate target tables. You may need to adjust the mapping to allow for multiple target tables if that is the intended design.
  Adjust Data Model: If the data model has changed, review the new data model and adjust the mappings accordingly. Ensure that the relationships between source and target tables are correctly defined.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be guidelines or best practices for setting up mappings that can help resolve the issue.
  Test with Sample Data: If possible, test the mapping with a smaller set of sample data to identify any issues before running the full migration.
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide insights based on your specific scenario.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context on mapping issues.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for mapping and transforming data during migration.
  Data Migration Best Practices: Review best practices for data migration in SAP environments, which can help prevent similar issues in the future.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.