How To Fix CNV_PE797 - Only fields of the data model root table and extension &1 are allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_PE - General messages for posting engine

• Message number: 797

• Message text: Only fields of the data model root table and extension &1 are allowed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_PE797 - Only fields of the data model root table and extension &1 are allowed ?

  The SAP error message CNV_PE797 typically occurs during data migration or data transfer processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an issue with the data being processed, specifically that only fields from the root table of the data model and its extensions are allowed in the context of the operation being performed.
  Cause:
  
  
  Invalid Field Mapping: The error often arises when the data being imported or processed includes fields that are not part of the defined root table or its extensions. This can happen if the data source includes additional fields that are not recognized by the target data model.
  
  
  Incorrect Data Structure: The structure of the data being migrated may not align with the expected structure defined in the migration cockpit or the data model. This can occur if there are discrepancies in the data schema.
  
  
  Configuration Issues: There may be configuration issues in the migration settings that do not allow for the inclusion of certain fields.
  
  
  Solution:
  
  
  Review Data Mapping: Check the mapping of the fields in your data source against the target data model. Ensure that only the fields from the root table and its extensions are included in the data being processed.
  
  
  Adjust Data Structure: If your data source contains additional fields, you may need to remove them or adjust your data structure to conform to the expected format. This may involve modifying the source data or the migration template.
  
  
  Check Migration Settings: Review the settings in the migration cockpit or the tool you are using for data migration. Ensure that the configuration allows for the correct fields and that there are no restrictions that could lead to this error.
  
  
  Consult Documentation: Refer to the official SAP documentation for the specific migration tool you are using. There may be guidelines or best practices that can help you avoid this error.
  
  
  Testing: After making adjustments, perform a test migration with a smaller dataset to ensure that the changes resolve the issue before attempting a full migration.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered and resolved similar issues.
  SAP Help Portal: Utilize the SAP Help Portal for detailed information on data migration processes and best practices.
  
  By following these steps, you should be able to identify the cause of the CNV_PE797 error and implement a solution to resolve it.