How To Fix UD705 - You modeled a loop in the generalizations; resolve the loop

SAP Error Message - Details

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 705

• Message text: You modeled a loop in the generalizations; resolve the loop

What causes this issue?

You generated a loop when modelling generalizations, i.e. you
encounter an entity type twice on the generalization path. Therefore
you cannot inherit attributes.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check you model and remove the loop.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UD705 - You modeled a loop in the generalizations; resolve the loop ?

  The SAP error message UD705 indicates that there is a loop in the generalization hierarchy of your data model. This typically occurs in the context of SAP Business Warehouse (BW) or SAP HANA when you are working with data modeling, particularly when defining hierarchies or relationships between different entities.
  Cause:
  The loop in generalizations usually arises when:
  
  Circular References: There are circular references in the hierarchy where an entity indirectly refers back to itself through a series of relationships.
  Incorrect Hierarchy Definition: The hierarchy is not defined correctly, leading to multiple paths to the same node.
  Multiple Generalizations: There are multiple generalizations that create a loop, making it impossible for the system to determine a clear path for data aggregation or reporting.
  
  Solution:
  To resolve the UD705 error, you can take the following steps:
  
  
  Review the Hierarchy: Examine the generalization hierarchy to identify where the loop occurs. Look for entities that reference each other in a circular manner.
  
  
  Modify Relationships: Adjust the relationships between entities to eliminate the circular reference. Ensure that each entity has a clear parent-child relationship without any backtracking.
  
  
  Use Alternative Structures: If the hierarchy is complex, consider using alternative structures such as separate hierarchies or different modeling techniques that do not create loops.
  
  
  Validate Model: After making changes, validate the model to ensure that the loop has been resolved and that the hierarchy is functioning as intended.
  
  
  Documentation and Best Practices: Refer to SAP documentation for best practices in modeling hierarchies and generalizations. This can help prevent similar issues in the future.
  
  
  Related Information:
  
  SAP Notes and Documentation: Check SAP Notes related to error UD705 for any specific patches or updates that may address this issue.
  Data Modeling Guidelines: Familiarize yourself with SAP's guidelines on data modeling, especially concerning hierarchies and generalizations.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed, providing insights or solutions from other users.
  
  By following these steps, you should be able to identify and resolve the loop in your generalization hierarchy, thus eliminating the UD705 error.