How To Fix BOM255 - BOM is not locked

SAP Error Message - Details

• Message type: E = Error

• Message class: BOM - BOMs (2)

• Message number: 255

• Message text: BOM is not locked

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message BOM255 - BOM is not locked ?

  The SAP error message BOM255, which states "BOM is not locked," typically occurs when there is an attempt to modify a Bill of Materials (BOM) that is not currently locked for editing. This can happen in various scenarios, such as when multiple users are trying to access or modify the same BOM simultaneously, or if the BOM was not properly locked during a previous operation.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing the BOM, preventing your session from locking it.
  Session Issues: The BOM may not have been locked due to a session timeout or an unexpected termination of a previous session.
  System Configuration: There may be configuration settings in the SAP system that affect how BOMs are locked and unlocked.
  Database Issues: There could be underlying database issues that prevent the locking mechanism from functioning correctly.
  
  Solution:
  
  Check for Active Sessions: Verify if another user is currently editing the BOM. You can use transaction codes like SM12 to check for locks on the BOM.
  Wait and Retry: If another user is editing the BOM, wait for them to finish and then try again.
  Manual Locking: If you have the necessary permissions, you can manually lock the BOM using transaction CS01 (Create BOM) or CS02 (Change BOM) and then proceed with your changes.
  Clear Sessions: If you suspect that a session is stuck, you can log out and log back in, or use transaction SM04 to see your active sessions and terminate any that are not responding.
  Check Configuration: Review the configuration settings related to BOM locking in your SAP system to ensure they are set up correctly.
  Contact Support: If the issue persists, it may be necessary to contact your SAP support team or consult SAP Notes for any known issues or patches related to BOM locking.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CS01, CS02, CS03 (Display BOM), and CS11 (BOM explosion).
  SAP Notes: Check SAP Notes for any specific fixes or updates related to BOM locking issues.
  User Permissions: Ensure that you have the necessary permissions to lock and edit BOMs in the system.
  Documentation: Refer to SAP documentation for detailed information on BOM management and locking mechanisms.
  
  By following these steps, you should be able to resolve the BOM255 error and successfully manage your BOMs in SAP.