How To Fix CNV_DMC_MC_EXCEPTION063 - Field name '&' not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 063

• Message text: Field name '&' not unique

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION063 - Field name '&' not unique ?

  The SAP error message CNV_DMC_MC_EXCEPTION063 with the description "Field name '&' not 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 system has encountered multiple fields with the same name, leading to ambiguity.
  Cause:
  
  Duplicate Field Names: The most common cause of this error is that the data source contains multiple fields with the same name, which confuses the migration tool as it cannot determine which field to use.
  Mapping Issues: If the mapping configuration in the migration tool is not set up correctly, it may lead to the same field being referenced multiple times.
  Data Structure Changes: Changes in the data structure between the source and target systems can also lead to this issue, especially if the same field is defined differently in both systems.
  
  Solution:
  
  Identify Duplicate Fields: Review the data source to identify any duplicate field names. This can often be done by examining the data structure or schema.
  Rename Fields: If possible, rename the duplicate fields in the source data to ensure that each field has a unique name.
  Adjust Mapping Configuration: Check the mapping configuration in the migration tool to ensure that each field is mapped correctly and uniquely.
  Use Aliases: If renaming is not feasible, consider using aliases in the mapping to differentiate between fields with the same name.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using for any additional guidelines or best practices regarding field naming and mapping.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Migration Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit for detailed instructions on handling field mappings and data structures.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the CNV_DMC_MC_EXCEPTION063 error and proceed with your data migration successfully.