How To Fix CNV_10020308 - Cardinality for &1 &2 &3 has not yet been determined

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 308

• Message text: Cardinality for &1 &2 &3 has not yet been determined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020308 - Cardinality for &1 &2 &3 has not yet been determined ?

  The SAP error message CNV_10020308 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the cardinality (the relationship between entities) for a specific data object has not been defined or determined in the context of the migration.
  Cause:
  
  Undefined Cardinality: The error suggests that the system is unable to determine how many instances of one entity relate to another. For example, it may not know how many line items correspond to a single header record.
  Configuration Issues: There may be missing or incorrect configuration settings in the migration project that prevent the system from understanding the relationships between data entities.
  Data Model Changes: If there have been changes in the data model (e.g., during an upgrade or migration), the cardinality may not have been updated accordingly.
  
  Solution:
  
  Check Migration Settings: Review the migration settings and ensure that all necessary configurations are in place. This includes verifying that the data model is correctly defined and that cardinality relationships are specified.
  Define Cardinality: If the cardinality is not defined, you may need to explicitly define it in the migration project. This can often be done in the migration cockpit or through the relevant configuration transactions.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be guidelines on how to set up cardinality for the entities involved.
  Data Mapping: Ensure that the data mapping between the source and target systems is correctly set up. This includes checking that all required fields are mapped and that their relationships are clear.
  Testing: After making changes, perform a test migration to see if the error persists. This can help identify if the issue has been resolved or if further adjustments are needed.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues. They may provide insights or solutions based on their experiences.
  SAP Support: If the issue persists and you are unable to resolve it, consider reaching out to SAP Support for assistance. They can provide more detailed troubleshooting based on your specific system configuration and migration scenario.
  
  By following these steps, you should be able to address the CNV_10020308 error and successfully complete your data migration process.