How To Fix CNV_10020028 - Elementary relationship &1, target obj.: Table field was not maintained

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 028

• Message text: Elementary relationship &1, target obj.: Table field was not maintained

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020028 - Elementary relationship &1, target obj.: Table field was not maintained ?

  The SAP error message CNV_10020028 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 there is an issue with the maintenance of a specific field in a target object, which is likely related to the mapping of source data to the target structure.
  Cause:
  The error message suggests that the elementary relationship for a specific field (denoted by &1) in the target object has not been properly maintained. This could be due to several reasons:
  
  Missing Field Mapping: The field in the source data may not have a corresponding field in the target structure, or the mapping may not have been defined correctly.
  Data Type Mismatch: The data type of the source field may not match the expected data type of the target field.
  Configuration Issues: There may be configuration issues in the data migration settings that prevent the system from recognizing the relationship between the source and target fields.
  Incomplete Data: The source data may be incomplete or not conforming to the expected format, leading to issues during the migration process.
  
  Solution:
  To resolve the error CNV_10020028, you can follow these steps:
  
  
  Check Field Mapping:
  
  Review the mapping configuration in the migration tool to ensure that the field in question is correctly mapped from the source to the target.
  Ensure that all required fields in the target structure are mapped appropriately.
  
  
  
  Verify Data Types:
  
  Check the data types of the source and target fields to ensure they are compatible. If there is a mismatch, you may need to adjust the data type in the source or target.
  
  
  
  Maintain Relationships:
  
  If the error indicates that an elementary relationship is not maintained, you may need to define or adjust the relationships in the target structure. This could involve configuring the target table or field settings in the SAP system.
  
  
  
  Review Source Data:
  
  Inspect the source data for completeness and correctness. Ensure that all necessary data is present and formatted correctly.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific migration tool you are using. There may be additional guidelines or troubleshooting steps provided for this error.
  
  
  
  Testing:
  
  After making the necessary adjustments, perform a test migration to see if the error persists. Monitor the logs for any additional errors or warnings.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration.
  Community Forums: Consider searching or posting in SAP community forums or discussion groups for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the error CNV_10020028 in your SAP environment.