How To Fix CNV_DMC_MC007 - Field name '&' must be unique

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC - Migration Object Modeler

• Message number: 007

• Message text: Field name '&' must be unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC007 - Field name '&' must be unique ?

  The SAP error message CNV_DMC_MC007, which states "Field name '&' must be unique," typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that there is a conflict with field names in the data being processed, where the same field name is being used more than once in a context where uniqueness is required.
  Cause:
  
  Duplicate Field Names: The most common cause of this error is that the data structure being imported or processed contains duplicate field names. This can happen if the source data has been incorrectly formatted or if there are multiple mappings that result in the same field name being generated.
  Mapping Issues: If you are using a mapping template or configuration, it may have been set up incorrectly, leading to the same field being defined multiple times.
  Data Source Issues: The source data might have inconsistencies or errors that lead to the generation of duplicate field names.
  
  Solution:
  
  Check Field Names: Review the data structure or mapping configuration to identify any duplicate field names. Ensure that each field name is unique within the context of the data migration.
  Modify Mapping: If you are using a mapping template, modify it to ensure that each field is mapped uniquely. This may involve renaming fields or adjusting the mapping logic.
  Data Cleansing: If the source data contains duplicates, perform data cleansing to remove or rename duplicate fields before attempting the migration again.
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit or the specific migration tool you are using for guidelines on how to structure your data and mappings correctly.
  Testing: After making changes, conduct a test migration with a smaller dataset to ensure that the issue has been resolved before proceeding with the full migration.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP, which can help prevent similar issues in the future.
  
  By addressing the root cause of the duplicate field names and ensuring that your data and mappings are correctly configured, you should be able to resolve the CNV_DMC_MC007 error.