How To Fix CNV_DMC_MC_EXCEPTION060 - The structure field '&1' already exists.

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 060

• Message text: The structure field '&1' already exists.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION060 - The structure field '&1' already exists. ?

  The SAP error message CNV_DMC_MC_EXCEPTION060 with the description "The structure field '&1' already exists" 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 due to the presence of a duplicate field in the structure being processed.
  Cause:
  
  
  Duplicate Field Definition: The error arises when the migration process encounters a field in the data structure that has already been defined. This can happen if:
  
  The same field is being defined multiple times in the mapping or transformation rules.
  There is a misconfiguration in the data model or mapping that leads to the same field being included more than once.
  
  
  
  Incorrect Mapping: If the mapping of source fields to target fields is not set up correctly, it can lead to the same field being processed multiple times.
  
  
  Data Model Issues: The underlying data model may have been altered or incorrectly set up, leading to conflicts in field definitions.
  
  
  Solution:
  
  
  Review Field Definitions: Check the structure definition in the migration project to ensure that each field is defined only once. Look for any duplicate entries in the mapping or transformation rules.
  
  
  Adjust Mapping: If you find that the same field is being mapped multiple times, adjust the mapping to ensure that each field is only included once.
  
  
  Check Data Model: Review the data model to ensure that it is correctly configured and does not contain any duplicate fields. If necessary, modify the data model to resolve conflicts.
  
  
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit or the specific migration tool you are using. There may be guidelines or best practices for setting up your migration project to avoid such issues.
  
  
  Testing: After making adjustments, run a test migration to ensure that the error has been resolved and that the data is being processed correctly.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  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 Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit for best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.