How To Fix DMU147 - External key for internal number &1 could not be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: DMU - Digital Mock Up (DMU)

• Message number: 147

• Message text: External key for internal number &1 could not be determined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMU147 - External key for internal number &1 could not be determined ?

  The SAP error message DMU147, which states "External key for internal number &1 could not be determined," typically occurs in the context of data migration or data transfer processes, particularly when using the Data Migration Workbench (DMW) or similar tools. This error indicates that the system is unable to find the external key that corresponds to the specified internal number.
  Causes:
  
  Missing Mapping: The external key mapping for the internal number may not be defined in the system. This can happen if the data migration process did not include the necessary mapping information.
  Incorrect Configuration: The configuration settings for the data migration might be incorrect, leading to the inability to resolve the internal number to an external key.
  Data Integrity Issues: There may be issues with the data itself, such as missing records or inconsistencies that prevent the system from determining the external key.
  Authorization Issues: The user executing the migration may not have the necessary authorizations to access the mapping tables or related data.
  
  Solutions:
  
  Check Mapping Tables: Verify that the mapping between internal and external keys is correctly set up in the relevant tables. Ensure that the external key exists for the internal number in question.
  Review Configuration: Check the configuration settings for the data migration process to ensure that they are correct and complete. This includes verifying that all necessary fields are included in the mapping.
  Data Validation: Perform a data validation check to ensure that all required records are present and that there are no inconsistencies in the data that could lead to this error.
  User Authorizations: Ensure that the user executing the migration has the necessary authorizations to access the relevant data and mapping tables.
  Consult Documentation: Refer to SAP documentation or notes related to the specific data migration process you are using, as there may be additional steps or considerations specific to your scenario.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with transaction codes related to data migration, such as LSMW (Legacy System Migration Workbench) or other relevant tools.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered and resolved similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.