How To Fix CDS_UNIT_MESSAGE031 - Hierarchy testing of &1 is not possible.

SAP Error Message - Details

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 031

• Message text: Hierarchy testing of &1 is not possible.

Because test double creation is not possible for &V2& as &V3& testing is
already enabled for &V4&.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CDS_UNIT_MESSAGE031 - Hierarchy testing of &1 is not possible. ?

  The SAP error message CDS_UNIT_MESSAGE031 with the description "Hierarchy testing of &1 is not possible" typically occurs in the context of Core Data Services (CDS) views when there is an issue related to the hierarchy structure or the data model being used.
  Cause:
  
  Hierarchy Not Defined: The hierarchy for the specified object (indicated by &1) may not be defined or activated in the system.
  Incorrect Data Model: The data model may not support hierarchy testing due to missing relationships or incorrect configurations.
  Authorization Issues: The user may not have the necessary authorizations to access the hierarchy data.
  Technical Issues: There could be technical issues with the underlying database or the CDS view itself.
  
  Solution:
  
  Check Hierarchy Definition: Ensure that the hierarchy for the specified object is correctly defined and activated in the system. You can do this by navigating to the relevant hierarchy maintenance transaction (e.g., RSH1 for InfoObjects).
  Review Data Model: Verify that the data model supports hierarchy testing. Check the relationships and ensure that they are correctly set up.
  Authorization Check: Ensure that the user has the necessary authorizations to access the hierarchy. This may involve checking roles and authorizations in the user profile.
  Debugging: If the issue persists, consider debugging the CDS view or checking the underlying database tables to identify any inconsistencies or errors.
  Consult Documentation: Refer to SAP documentation or notes related to the specific CDS view or hierarchy functionality for additional guidance.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  CDS Views: Familiarize yourself with the structure and configuration of CDS views, especially those related to hierarchies.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  
  If the problem continues after following these steps, it may be beneficial to reach out to SAP support for further assistance.