How To Fix PPECMP604 - Relationship of &1 to &2 creates recursion via follow-up material in BOM

PPECMP604 - Overview

• Message type: E = Error

• Message class: PPECMP - Messages for iPPE CMP Application (Components)

• Message number: 604

• Message text: Relationship of &1 to &2 creates recursion via follow-up material in BOM

What causes this issue?

The created or changed relationship of node &V1& to node &V2& creates a
recursion involving a bill of material and a follow-up material.
&V4& is the follow-up material to &V3&.
One material that you are using in the nodes <(>,<)> is likewise a part
of a bill of material. As a result, the product structure becomes
recursive, as follows:
Either directly by an immediately-assigned other node and its material
reference in the bill of material, or by a different material in this
bill of material
Or indirectly by a different material that exists in the product
structure and likewise has to be part of a bill of material
In the present case, the recursion is caused by a follow-up material.

System Response

The relationship is not created.

How to fix this error?

Start the recursivity analysis with the materials you have used in the
nodes &V1& and &V2&, and check the bills of material <(>,<)> in which
the materials &V3& or &V4& are used. The original error can also lie
with other materials in the product structure that exist in bills of and
have follow-up materials.

Procedure for System Administrators

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.

PPECMP604 - Details

• The SAP error message PPECMP604 indicates that there is a recursion issue in the Bill of Materials (BOM) due to a relationship between two materials. Specifically, it suggests that the relationship between the two materials (denoted as &1 and &2) creates a circular reference, which can lead to infinite loops during processing.
  
  Cause:
  The recursion typically occurs when:
  
  A material (e.g., a component) is defined in the BOM of another material (e.g., a parent) in such a way that it indirectly refers back to itself through a series of relationships.
  There are follow-up materials or alternative components that create a loop in the BOM structure.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review BOM Structure: Check the BOM for the materials involved. Look for any circular references where one material is listed as a component of another, which in turn is a component of the first material.
  
  
  Identify Relationships: Analyze the relationships between the