How To Fix CNV_10020352 - &1 &2: Maximum cardinality &3 is less than system cardinality &4

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 352

• Message text: &1 &2: Maximum cardinality &3 is less than system cardinality &4

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020352 - &1 &2: Maximum cardinality &3 is less than system cardinality &4 ?

  The SAP error message CNV_10020352 typically occurs during data migration or conversion processes, particularly when using SAP's Data Migration tools or during system upgrades. This error indicates a mismatch between the expected cardinality of a data structure and the actual cardinality present in the system.
  Cause:
  The error message CNV_10020352 is triggered when:
  
  The maximum cardinality defined for a certain data structure (like a table or a field) is less than the actual number of entries or relationships that exist in the system. 
  For example, if a field is defined to allow a maximum of 1 entry (maximum cardinality of 1), but the system has multiple entries (system cardinality of 4), this discrepancy will lead to the error.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Data Model: Check the data model or structure definitions in your SAP system. Ensure that the maximum cardinality settings are appropriate for the data being processed.
  
  
  Adjust Cardinality Settings: If the maximum cardinality is indeed too low, you may need to adjust it to accommodate the actual data. This could involve modifying the data model or configuration settings in the SAP system.
  
  
  Data Cleanup: If the data model is correct but the actual data is not, consider cleaning up the data. This may involve removing duplicate entries or consolidating data to fit within the defined cardinality.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration or conversion process you are performing. There may be specific guidelines or recommendations for handling cardinality issues.
  
  
  Testing: After making adjustments, perform tests to ensure that the changes resolve the error and that the data migration or conversion process can proceed without further issues.
  
  
  Seek Support: If you are unable to resolve the issue, consider reaching out to SAP support or consulting with an SAP expert who can provide guidance based on the specifics of your system and data.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Data Migration Tools: Familiarize yourself with the tools and processes used for data migration in SAP, such as the SAP S/4HANA Migration Cockpit or SAP Data Services.
  Cardinality Concepts: Understanding the concepts of cardinality in database design can help in troubleshooting similar issues in the future.
  
  By following these steps, you should be able to identify the root cause of the CNV_10020352 error and implement a suitable solution.