How To Fix CK621 - Int. error with BOM explosion: Matl & in plant & exists more than once

SAP Error Message - Details

• Message type: E = Error

• Message class: CK - Product Costing Messages

• Message number: 621

• Message text: Int. error with BOM explosion: Matl & in plant & exists more than once

What causes this issue?

An error occurred during quantity structure determination. Material
&V1& in plant &V2& appears several times in the material overview.

System Response

The material cannot be costed.

How to fix this error?

Notify your system administration.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CK621 - Int. error with BOM explosion: Matl & in plant & exists more than once ?

  The SAP error message CK621 indicates that there is an issue with the Bill of Materials (BOM) explosion process. Specifically, it means that the material specified in the error message exists more than once in the BOM for the given plant. This can lead to confusion during the BOM explosion process, as SAP cannot determine which instance of the material to use.
  Cause:
  
  Duplicate BOM Entries: The most common cause of this error is that the same material is listed multiple times in the BOM for the same plant. This can happen due to data entry errors or incorrect BOM configuration.
  Incorrect BOM Configuration: If the BOM is not set up correctly, it may lead to multiple entries for the same component.
  Material Master Issues: There may be issues with the material master data that cause the system to recognize the same material in different ways.
  
  Solution:
  
  
  Check BOM for Duplicates:
  
  Go to the BOM transaction (CS03) and check the BOM for the material in question.
  Look for duplicate entries for the same component in the BOM for the specified plant.
  If duplicates are found, remove or consolidate them as necessary.
  
  
  
  Review Material Master Data:
  
  Check the material master data for the material in question to ensure that it is set up correctly and that there are no inconsistencies.
  Ensure that the material is not defined in multiple ways that could lead to confusion during the BOM explosion.
  
  
  
  BOM Configuration:
  
  If the BOM is configured incorrectly, you may need to reconfigure it to ensure that each component is listed only once.
  If necessary, create a new BOM with the correct configuration.
  
  
  
  Use Transaction Codes:
  
  Use transaction codes like CS01 (Create BOM), CS02 (Change BOM), and CS03 (Display BOM) to manage BOM entries.
  Use transaction code CS12 (BOM Comparison) to compare BOMs and identify discrepancies.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help resources for additional guidance on BOM management and troubleshooting.
  
  
  
  Related Information:
  
  BOM Structure: Understanding the structure of BOMs in SAP is crucial for effective management. Each BOM can have multiple components, and each component can have its own sub-components.
  Material Types: Different material types may have different rules regarding BOMs, so ensure that the material type is appropriate for the BOM being created.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional solutions related to BOM management and the CK621 error.
  
  By following these steps, you should be able to resolve the CK621 error and ensure that your BOMs are correctly configured for the materials in question.