How To Fix STEP663 - Recursive BOMs are not supported (Item &1, item number &2)

SAP Error Message - Details

• Message type: E = Error

• Message class: STEP - ISO 10303 STEP Mapping Messages

• Message number: 663

• Message text: Recursive BOMs are not supported (Item &1, item number &2)

Self-Explanatory Message

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• What is the cause and solution for SAP error message STEP663 - Recursive BOMs are not supported (Item &1, item number &2) ?

  The SAP error message "STEP663 Recursive BOMs are not supported (Item &1, item number &2)" indicates that there is a problem with the Bill of Materials (BOM) structure in your SAP system. Specifically, it suggests that there is a recursive relationship in the BOM, meaning that an item is referencing itself either directly or indirectly, which is not allowed in SAP.
  Cause:
  
  Recursive BOM Structure: The most common cause of this error is that the BOM for a particular item includes itself as a component, either directly or through a chain of components. For example, if Item A includes Item B, and Item B includes Item A, this creates a recursive loop.
  Incorrect BOM Configuration: There may be an error in how the BOM has been configured, leading to unintended recursive references.
  Data Entry Errors: Manual data entry errors can lead to incorrect BOM definitions that create recursive relationships.
  
  Solution:
  
  Review the BOM: Check the BOM for the item specified in the error message. Look for any components that reference the item itself or create a loop with other components.
  Correct the BOM Structure: If you find a recursive reference, you will need to modify the BOM to remove the recursive relationship. This may involve:
  
  Removing the item from its own BOM.
  Adjusting the components to ensure that they do not create a loop.
  
  
  Use BOM Explosion: If you are unsure where the recursion is occurring, you can use the BOM explosion functionality in SAP to visualize the structure and identify the problematic components.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on how to properly structure BOMs and avoid recursive relationships.
  Testing: After making changes, test the BOM to ensure that the error no longer occurs and that the BOM functions as expected.
  
  Related Information:
  
  BOM Management: Understanding how to manage and configure BOMs in SAP is crucial. Familiarize yourself with the relevant transaction codes (e.g., CS01 for creating BOMs, CS02 for changing BOMs, and CS03 for displaying BOMs).
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to BOM management and recursive errors.
  Training: Consider training or resources on SAP BOM management to prevent similar issues in the future.
  
  By following these steps, you should be able to resolve the "STEP663 Recursive BOMs are not supported" error and ensure that your BOMs are correctly structured.