Message type: E = Error
Message class:  CNVPD - BOM Converter Notifications 
Message number: 081
Message text: User & is locking BOM item
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The SAP error message CNVPD081 indicates that a user is locking a Bill of Materials (BOM) item. This typically occurs during data migration or conversion processes, particularly when using the SAP Conversion Tools or during system upgrades. The error suggests that the BOM item you are trying to access or modify is currently locked by another user or process.
Cause: User Lock: Another user is currently editing or has locked the BOM item. Background Jobs: A background job or process is accessing the BOM item, preventing other operations. Transaction Lock: The transaction you are trying to execute is trying to access a BOM item that is locked due to another transaction.
Solution: Identify the Lock: Use transaction code SM12 to check for user locks. You can filter by the user ID or the object type related to BOM. Look for the specific BOM item that is locked and identify the user or process that is holding the lock. Release
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