How To Fix CM_SUB001 - Source specification &1 could not be locked

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_SUB - Substance (general)

• Message number: 001

• Message text: Source specification &1 could not be locked

What causes this issue?

The system attempted to place an exclusive lock on the source
specification. However, the source specification is already locked.

How to fix this error?

Ensure that the source specification is not currently being processed
or used.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM_SUB001 - Source specification &1 could not be locked ?

  The SAP error message CM_SUB001 indicates that a source specification (usually a material or a resource) could not be locked for processing. This typically occurs in scenarios where multiple users or processes are trying to access or modify the same object simultaneously, leading to a conflict.
  Causes:
  
  Concurrent Access: Another user or process is currently using the source specification, preventing your transaction from locking it.
  Long-running Transactions: A transaction that takes a long time to complete may hold the lock longer than expected.
  System Performance Issues: High system load or performance issues can lead to delays in locking mechanisms.
  Database Locks: Locks at the database level may also prevent access to the source specification.
  Configuration Issues: Incorrect configuration in the system may lead to locking issues.
  
  Solutions:
  
  Wait and Retry: If the lock is due to another user, wait for a few moments and then try again.
  Identify Locking User: Use transaction SM12 to check for existing locks. You can identify the user or process that is holding the lock and coordinate with them.
  Check Long-running Transactions: Use transaction SM66 to monitor active processes and identify any long-running transactions that may be holding locks.
  System Performance: If the system is under heavy load, consider optimizing performance or scheduling heavy jobs during off-peak hours.
  Database Administration: If you suspect database-level locks, consult with your database administrator to resolve any issues.
  Configuration Review: Review the configuration settings related to locking mechanisms in your SAP system to ensure they are set up correctly.
  
  Related Information:
  
  Transaction Codes: 
  
  SM12: To view and manage locks.
  SM66: To monitor active processes in the system.
  SM21: To check system logs for any related errors or warnings.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking mechanisms.
  Documentation: Review SAP documentation on locking behavior and best practices for managing concurrent access.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.