How To Fix USMD1128 - Data model &1: Foreign key relationship &2 has DDIC table assignment

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 128

• Message text: Data model &1: Foreign key relationship &2 has DDIC table assignment

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1128 - Data model &1: Foreign key relationship &2 has DDIC table assignment ?

  The SAP error message USMD1128 indicates that there is an issue with a foreign key relationship in a data model, specifically that the foreign key relationship has a Data Dictionary (DDIC) table assignment. This error typically arises in the context of SAP Master Data Governance (MDG) when working with data models and their associated relationships.
  Cause:
  The error occurs when:
  
  A foreign key relationship defined in the data model is linked to a DDIC table, which is not allowed in certain contexts within SAP MDG.
  The data model is expected to use a specific structure or reference that does not include direct DDIC table assignments.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check the Data Model Configuration:
  
  Review the data model configuration in the SAP MDG system. Ensure that the foreign key relationships are correctly defined and do not reference DDIC tables directly.
  
  
  
  Modify Foreign Key Relationships:
  
  If a foreign key relationship is pointing to a DDIC table, consider changing it to point to a different structure or entity that is compatible with the MDG framework.
  You may need to create a new entity or structure that can serve as an intermediary instead of directly referencing the DDIC table.
  
  
  
  Consult Documentation:
  
  Refer to the SAP MDG documentation for guidelines on defining data models and foreign key relationships. This can provide insights into the correct practices and structures to use.
  
  
  
  Use Transaction Codes:
  
  Use transaction codes like MDGIMG to access the configuration settings for your data model and make necessary adjustments.
  
  
  
  Testing:
  
  After making changes, test the data model to ensure that the foreign key relationships are functioning correctly and that the error no longer appears.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data model configurations.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have implemented.
  Training and Documentation: Consider training sessions or documentation on SAP MDG data modeling to better understand the constraints and best practices.
  
  By following these steps, you should be able to resolve the USMD1128 error and ensure that your data model is correctly configured without direct DDIC table assignments in foreign key relationships.