How To Fix CH021 - BOM "&" contains component "&" more than once as item "&" category "&"

CH021 - Overview

• Message type: E = Error

• Message class: CH - CAD/PP integration messages

• Message number: 021

• Message text: BOM "&" contains component "&" more than once as item "&" category "&"

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CH021 - BOM "&" contains component "&" more than once as item "&" category "&" ?

  The SAP error message CH021 indicates that there is a problem with a Bill of Materials (BOM) where a specific component is listed more than once for a given item. This can lead to confusion in production planning and inventory management, as SAP expects each component in a BOM to be unique for a specific item.
  
  Cause:
  The error occurs when:
  
  A component is accidentally added multiple times to the same BOM.
  There may be a mistake in the BOM creation or maintenance process.
  The BOM structure is not correctly defined, leading to duplicate entries.
  
  
  Solution:
  To resolve the CH021 error, you can follow these steps:
  
  
  Check the BOM: 
  
  Use transaction code CS03 (Display BOM) to view the BOM in question.
  Enter the material number and plant to display the BOM.
  
  
  
  Identify Duplicates:
  
  Look for the component that is listed more than once. The error message will specify the component and the item category.
  Ensure that each component is only listed once