How To Fix PPEACT641 - Hierarchy relationship between &1 and &2 cannot be deleted

PPEACT641 - Overview

• Message type: E = Error

• Message class: PPEACT - Messages for iPPE ACT Application (Activities)

• Message number: 641

• Message text: Hierarchy relationship between &1 and &2 cannot be deleted

What causes this issue?

You have tried to delete a hierarchy relationship (part-of) between two
objects in the routing.
The assigned object, that is, the object on the lower hierarchy level,
still has sequence relationships to other objects. To avoid
inconsistenc
ies, the specified relationship has not been deleted.

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

System Response

How to fix this error?

Delete the sequence relationships that the lower-level object still
has.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPEACT641 - Hierarchy relationship between &1 and &2 cannot be deleted ?

  The SAP error message PPEACT641 indicates that there is a hierarchy relationship between two elements (denoted as &1 and &2) that cannot be deleted. This typically occurs in the context of SAP's Product Lifecycle Management (PLM) or similar modules where hierarchical relationships are established between various objects, such as materials, BOMs (Bill of Materials), or other entities.
  
  Cause:
  
  
  Existing Dependencies: The relationship between the two elements may be required due to existing dependencies or references in the system. For example, if there are other objects or processes that rely on this relationship, SAP will prevent its deletion to maintain data integrity.
  
  
  Active Processes: If there are active processes or transactions that involve either of the elements in the hierarchy, the system will not allow the deletion of the relationship.
  
  
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to delete the relationship, leading to this error.
  
  
  System Configuration: Certain configurations or settings in