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

/PLMI/MBOM_SP001 - Overview

• 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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/PLMI/MBOM_SP001 - Details

• 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