How To Fix PPECMP603 - Relationship of node &1 to node &2 creates recursion via bill of material

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 603

• Message text: Relationship of node &1 to node &2 creates recursion via bill of material

What causes this issue?

The created or changed relationship of node &V1& to node &V2& creates a
recursion involving a bill of material.
The header material of this bill of material is &V3&, the component is
&V4&.
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

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& und &V4& are used.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message PPECMP603 - Relationship of node &1 to node &2 creates recursion via bill of material ?

  The SAP error message PPECMP603 indicates that there is a recursion issue in the bill of materials (BOM) structure. This typically occurs when a node (component) in the BOM references another node in such a way that it creates a circular dependency. For example, if component A references component B, and component B references component A, this creates a recursion that the system cannot resolve.
  Cause:
  
  Circular Reference: The most common cause is a circular reference in the BOM where two or more components reference each other.
  Incorrect BOM Structure: The BOM may have been incorrectly structured or maintained, leading to unintended relationships between components.
  Data Entry Errors: Manual data entry errors can lead to incorrect relationships being established between components.
  
  Solution:
  
  Review BOM Structure: Check the BOM structure for the components involved in the error message. Look for any circular references or unintended relationships.
  Correct Relationships: If you find a circular reference, you will need to correct the relationships between the components. This may involve removing or changing the references that create the recursion.
  Use BOM Analysis Tools: Utilize SAP tools or reports that can help analyze the BOM structure for circular references. This can help identify problematic nodes quickly.
  Test Changes: After making changes, test the BOM to ensure that the error no longer occurs and that the BOM functions as expected.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on maintaining BOMs and avoiding recursion issues.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like CS03 (Display BOM) or CS02 (Change BOM) to view and modify BOMs.
  BOM Structure: Understand the hierarchy and structure of your BOMs, including parent-child relationships.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance on BOM management.
  Training: Consider training for users who manage BOMs to ensure they understand how to avoid creating circular references.
  
  By addressing the root cause of the recursion and ensuring proper BOM management practices, you can resolve the PPECMP603 error and prevent it from occurring in the future.