How To Fix USMD1652 - Navigation not possible, relationship is no foreign key relationship

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 652

• Message text: Navigation not possible, relationship is no foreign key relationship

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1652 - Navigation not possible, relationship is no foreign key relationship ?

  The SAP error message USMD1652, which states "Navigation not possible, relationship is no foreign key relationship," typically occurs in the context of SAP Master Data Governance (MDG) when trying to navigate between entities or data models that are not properly linked through foreign key relationships.
  Cause:
  
  
  Missing Foreign Key Relationship: The primary cause of this error is that the relationship you are trying to navigate does not have a defined foreign key relationship in the underlying data model. This means that the system does not recognize how the two entities are related.
  
  
  Incorrect Configuration: The data model may not be configured correctly, or the relationships between the entities may not have been set up properly in the MDG configuration.
  
  
  Data Model Changes: If there have been recent changes to the data model or relationships, it is possible that the navigation paths have not been updated accordingly.
  
  
  Solution:
  
  
  Check Data Model Configuration:
  
  Go to the MDG data model configuration and verify that the relationship you are trying to navigate is defined as a foreign key relationship.
  Ensure that the source and target entities are correctly defined and that the foreign key constraints are in place.
  
  
  
  Define Foreign Key Relationships:
  
  If the relationship does not exist, you may need to create a foreign key relationship between the two entities in the data model.
  This can typically be done in the MDG customizing settings under the relevant data model.
  
  
  
  Review Navigation Paths:
  
  Check the navigation paths defined in the MDG configuration. Ensure that they are correctly set up to allow navigation between the entities.
  
  
  
  Test the Changes:
  
  After making any changes, test the navigation again to ensure that the error has been resolved.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on configuring foreign key relationships in your version of SAP MDG.
  
  
  
  Seek Support:
  
  If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting with an SAP expert who can provide assistance based on your specific configuration and requirements.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  MDG Configuration Guides: Review the configuration guides for SAP MDG to understand how to set up data models and relationships properly.
  Community 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 the cause of the USMD1652 error and implement a solution to resolve it.