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

CDS_UNIT_MESSAGE031 - Overview

• 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