How To Fix /PLMI/MBOM_SP001 - Locking is only possible for material BOM headers

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMI/MBOM_SP -

• Message number: 001

• Message text: Locking is only possible for material BOM headers

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMI/MBOM_SP001 - Locking is only possible for material BOM headers ?

  The SAP error message /PLMI/MBOM_SP001 Locking is only possible for material BOM headers typically occurs when there is an attempt to lock a Bill of Materials (BOM) that is not a header level BOM. This error is often encountered in the context of BOM management in SAP, particularly when working with the Material BOM (Bill of Materials) in the Production Planning (PP) module.
  Cause:
  
  Incorrect BOM Level: The error indicates that the system is trying to lock a BOM item that is not at the header level. In SAP, BOMs can have multiple levels (header and item levels), and locking is only applicable to the header level.
  BOM Type: The BOM type being processed may not be a material BOM. For example, it could be a variant BOM or a different type that does not support locking.
  System Configuration: There may be configuration settings in the SAP system that restrict locking for certain types of BOMs.
  
  Solution:
  
  Check BOM Level: Ensure that you are trying to lock the BOM at the header level. You can do this by navigating to the BOM in the SAP GUI and verifying that you are selecting the correct BOM header.
  Use the Correct Transaction: Make sure you are using the appropriate transaction code for locking BOMs. For example, use transaction CS02 (Change BOM) to access the BOM header.
  Review BOM Type: Confirm that the BOM you are working with is indeed a material BOM. If it is a different type, you may need to handle it differently or use a different process.
  Check User Authorizations: Ensure that you have the necessary authorizations to lock BOMs in the system. Lack of proper permissions can sometimes lead to unexpected errors.
  Consult Documentation: Refer to SAP documentation or help files for specific details on BOM management and locking mechanisms.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Training and Documentation: If you are new to BOM management in SAP, consider reviewing training materials or documentation that cover the basics of BOMs, including how to manage and lock them properly.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can provide deeper insights into the specific configuration and setup of your SAP environment.