How To Fix DMU156 - Relationship between &1 and &2 is not allowed because it is recursive

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 156

• Message text: Relationship between &1 and &2 is not allowed because it is recursive

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMU156 - Relationship between &1 and &2 is not allowed because it is recursive ?

  The SAP error message DMU156 indicates that there is a recursive relationship between two objects in the Data Management Utility (DMU). This typically occurs when an object is trying to reference itself directly or indirectly through another object, which is not allowed in the system.
  Cause:
  The error arises when:
  
  You are trying to create a relationship between two objects (e.g., master data, organizational units, etc.) where one object is a parent of the other, and the child object is also trying to reference the parent object, creating a loop.
  The relationship structure violates the rules of hierarchy or relationships defined in the system.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Relationships: Check the relationships between the objects involved. Ensure that there is no circular reference where an object is indirectly referencing itself.
  
  
  Modify Relationships: If you find a recursive relationship, you will need to modify the relationships to eliminate the recursion. This may involve:
  
  Changing the hierarchy structure.
  Removing or altering the relationship that causes the recursion.
  
  
  
  Data Model Validation: Validate your data model to ensure that all relationships are correctly defined and do not create loops.
  
  
  Consult Documentation: Refer to SAP documentation or guidelines regarding the specific objects you are working with to understand the allowed relationships.
  
  
  Testing: After making changes, test the relationships again to ensure that the error is resolved.
  
  
  Related Information:
  
  Transaction Codes: You may need to use specific transaction codes related to the Data Management Utility or the objects you are working with to view or modify relationships.
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or solutions related to this error.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  By following these steps, you should be able to identify and resolve the recursive relationship issue indicated by the DMU156 error message.