How To Fix /ACCGO/MCK_MAINT651 - Cannot lock BOM

SAP Error Message - Details

• Message type: E = Error

• Message class: /ACCGO/MCK_MAINT -

• Message number: 651

• Message text: Cannot lock BOM

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /ACCGO/MCK_MAINT651 - Cannot lock BOM ?

  The SAP error message /ACCGO/MCK_MAINT651 Cannot lock BOM typically occurs when there is an attempt to modify a Bill of Materials (BOM) that is currently being accessed or locked by another user or process. This can happen in various scenarios, such as during BOM maintenance, creation, or deletion.
  Causes:
  
  Concurrent Access: Another user or transaction is currently editing or locking the BOM.
  Background Jobs: A background job may be processing the BOM, preventing any changes.
  System Lock: The system may have a lock due to a previous transaction that did not complete properly.
  Authorization Issues: The user may not have the necessary authorizations to access or modify the BOM.
  
  Solutions:
  
  
  Check for Locks:
  
  Use transaction code SM12 to check for existing locks on the BOM. You can filter by the relevant user or object.
  If you find a lock that is no longer needed, you can delete it (if you have the necessary authorizations).
  
  
  
  Wait and Retry:
  
  If another user is editing the BOM, you may need to wait until they finish and then try again.
  
  
  
  Check Background Jobs:
  
  Use transaction code SM37 to check if there are any background jobs that might be locking the BOM. If you find any, you may need to wait for them to complete or contact the job owner.
  
  
  
  Review Authorizations:
  
  Ensure that you have the necessary authorizations to access and modify the BOM. You may need to contact your SAP security team if you suspect authorization issues.
  
  
  
  System Restart:
  
  In rare cases, a system restart may be necessary if there are persistent locks that cannot be resolved through normal means.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  CS01, CS02, CS03: Create, Change, and Display BOM respectively.
  SM12: Display and delete locks.
  SM37: Monitor background jobs.
  
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to BOM locking issues. You can search for relevant notes in the SAP Support Portal.
  
  
  Documentation: Review SAP documentation for BOM management to understand the locking mechanism and best practices for avoiding such issues.
  
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP Basis or technical support team for further investigation.