How To Fix CNV_DMC_MC_EXCEPTION009 - The source structure &1 is already assigned

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 009

• Message text: The source structure &1 is already assigned

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_MC_EXCEPTION009 - The source structure &1 is already assigned ?

  The SAP error message CNV_DMC_MC_EXCEPTION009 indicates that there is an issue with the data migration process, specifically that the source structure you are trying to assign is already assigned to another target structure. This typically occurs during data migration activities using the SAP Data Migration Cockpit (DMC) or similar tools.
  Cause:
  
  Duplicate Assignment: The source structure you are trying to use has already been assigned to a different target structure in the migration project.
  Configuration Error: There may be a misconfiguration in the mapping of source and target structures.
  Data Model Conflicts: Conflicts in the data model where the same source structure is being used in multiple contexts.
  
  Solution:
  
  Check Assignments: Review the current assignments of the source structure in the migration project. Ensure that it is not already linked to another target structure.
  Modify Mapping: If the source structure needs to be used for a different target, consider modifying the mapping to avoid conflicts. You may need to create a new source structure or adjust the existing mappings.
  Remove Redundant Assignments: If the source structure is indeed assigned to another target structure but is not needed, you can remove that assignment to free it up for your intended use.
  Consult Documentation: Refer to the SAP documentation for the Data Migration Cockpit for specific guidelines on handling structure assignments and mappings.
  Check for Updates: Ensure that your SAP system is up to date, as there may be patches or updates that address known issues related to data migration.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to the Data Migration Cockpit for any known issues or additional troubleshooting steps.
  Migration Project Documentation: Review the documentation for your specific migration project to understand the structure and mappings involved.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.