How To Fix CM_EXPERT349 - Empty external ID for the composition &1 in the mapping table

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_EXPERT - Messages for Expert

• Message number: 349

• Message text: Empty external ID for the composition &1 in the mapping table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CM_EXPERT349 - Empty external ID for the composition &1 in the mapping table ?

  The SAP error message CM_EXPERT349 indicates that there is an issue with the external ID for a composition in the mapping table. This error typically arises in the context of SAP Master Data Governance (MDG) or when dealing with product data management, where compositions (like product structures) are defined.
  Cause:
  The error message "Empty external ID for the composition &1 in the mapping table" suggests that the system is trying to reference a composition (identified by &1) that does not have an associated external ID in the mapping table. This can occur due to several reasons:
  
  Missing Data: The external ID for the composition may not have been populated during data entry or migration.
  Data Inconsistency: There may be inconsistencies in the mapping table where the external ID is expected but not found.
  Configuration Issues: There could be configuration issues in the system that prevent the external ID from being generated or linked correctly.
  Data Migration Errors: If data was migrated from another system, the external IDs may not have been transferred correctly.
  
  Solution:
  To resolve the CM_EXPERT349 error, you can take the following steps:
  
  
  Check the Mapping Table: Verify the mapping table to ensure that the external ID for the specified composition exists. If it is missing, you will need to add it.
  
  
  Populate Missing External IDs: If the external ID is indeed missing, you can manually enter the required external ID for the composition in the relevant transaction or data maintenance screen.
  
  
  Data Validation: Run data validation checks to identify any other compositions that may also be missing external IDs.
  
  
  Review Data Migration Processes: If the issue arose after a data migration, review the migration process to ensure that all necessary data, including external IDs, was transferred correctly.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on handling mapping tables and external IDs in your version of SAP.
  
  
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in managing compositions and mapping tables, such as MDG_MAT for material governance.
  SAP Notes: Check for any SAP Notes related to this error message, as they may provide additional insights or patches.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify and resolve the issue related to the CM_EXPERT349 error message in SAP.