How To Fix D9373 - Cyclic composition not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: D9 - Environment Management System

• Message number: 373

• Message text: Cyclic composition not allowed

What causes this issue?

A specification consists of itself (example: A consists of B and C, B
consists of A and D).
This is not permitted in the GetCompTree method, otherwise it could lead
to an endless cycle.

System Response

The system cancels processing.

How to fix this error?

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

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 D9373 - Cyclic composition not allowed ?

  The SAP error message D9373, "Cyclic composition not allowed," typically occurs in the context of SAP's Product Lifecycle Management (PLM) or when dealing with Bill of Materials (BOM) structures. This error indicates that there is a cyclic dependency in the composition of materials or components, meaning that a component is indirectly or directly referencing itself, which is not allowed in SAP.
  Cause:
  
  Cyclic Dependency: The most common cause of this error is that a material or component is included in its own BOM or structure, either directly or through a chain of other components. For example, if Component A includes Component B, and Component B includes Component A, this creates a cycle.
  Incorrect BOM Structure: The BOM may have been incorrectly defined, leading to unintended cyclic references.
  Data Entry Errors: Manual entry errors during the creation or modification of BOMs or material master records can lead to cyclic compositions.
  
  Solution:
  
  
  Review BOM Structure: Check the BOM for the material in question. Look for any components that may reference the parent material or create a cycle. You can do this by:
  
  Using transaction codes like CS03 (Display BOM) to view the BOM structure.
  Analyzing the components to ensure that none of them refer back to the parent material or create a loop.
  
  
  
  Correct the BOM: If a cyclic dependency is found, you will need to modify the BOM to remove the cyclic reference. This may involve:
  
  Removing the problematic component.
  Replacing it with a different component that does not create a cycle.
  
  
  
  Use Tools: Utilize SAP tools or reports that can help identify cyclic dependencies in BOMs. Some custom reports or standard SAP reports may assist in identifying these issues.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidelines on proper BOM structure and management to avoid cyclic dependencies in the future.
  
  
  Testing: After making changes, test the BOM to ensure that the error no longer occurs and that the BOM functions as intended.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CS01 (Create BOM), CS02 (Change BOM), and CS03 (Display BOM) for managing BOMs.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message, as there may be known issues or fixes provided by SAP.
  Training: Consider training or resources on BOM management and PLM processes in SAP to better understand how to structure materials and avoid cyclic dependencies.
  
  By following these steps, you should be able to resolve the D9373 error and prevent it from occurring in the future.