How To Fix CPWB421 - BOM header has not been changed

SAP Error Message - Details

• Message type: E = Error

• Message class: CPWB - General Workbench Messages

• Message number: 421

• Message text: BOM header has not been changed

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CPWB421 - BOM header has not been changed ?

  The SAP error message CPWB421 indicates that the Bill of Materials (BOM) header has not been changed. This message typically occurs when you are trying to save or process a BOM in the SAP system, but the system detects that there are no changes made to the BOM header data.
  Cause:
  
  No Changes Made: The most common cause is that you are attempting to save a BOM after making no actual changes to the header data.
  Incorrect Transaction: You might be using a transaction that expects changes to be made, but you are not modifying any fields.
  User Error: Sometimes, users may think they have made changes when they have not, such as not saving after editing.
  
  Solution:
  
  Verify Changes: Ensure that you have made actual changes to the BOM header before attempting to save. Check fields like the BOM status, validity dates, or any other relevant header information.
  Save Only When Necessary: If you have not made any changes, there is no need to save. You can exit the transaction without saving.
  Check for Required Fields: Ensure that all required fields are filled out correctly if you are trying to create or modify a BOM.
  Use the Correct Transaction: Make sure you are using the appropriate transaction code for the action you are trying to perform (e.g., creating, changing, or displaying a BOM).
  
  Related Information:
  
  Transaction Codes: Common transaction codes related to BOM management include:
  
  CS01: Create BOM
  CS02: Change BOM
  CS03: Display BOM
  
  
  BOM Types: Understand the different types of BOMs (e.g., single-level, multi-level) and their specific requirements.
  SAP Notes: Check SAP Notes for any known issues or updates related to BOM processing that might be relevant to your version of SAP.
  User Documentation: Refer to SAP Help documentation for detailed guidance on BOM management and the specific fields involved in the BOM header.
  
  If the issue persists after verifying the above points, it may be beneficial to consult with your SAP support team or refer to SAP community forums for further assistance.