How To Fix /SCWM/ADAPTER_MP012 - Locking error

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/ADAPTER_MP -

• Message number: 012

• Message text: Locking error

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/ADAPTER_MP012 - Locking error ?

  The SAP error message /SCWM/ADAPTER_MP012 Locking error typically occurs in the context of the SAP Extended Warehouse Management (EWM) system. This error is related to locking issues that can arise when multiple processes or transactions attempt to access the same data simultaneously, leading to conflicts.
  Cause:
  
  Concurrent Access: The most common cause of this error is that multiple users or processes are trying to access or modify the same data at the same time, leading to a locking conflict.
  Long-running Transactions: If a transaction takes too long to complete, it can hold locks on certain data, preventing other transactions from accessing it.
  System Configuration: Incorrect configuration of the EWM system or the underlying database can also lead to locking issues.
  Database Locks: Locks at the database level can also cause this error, especially if there are long-running queries or transactions.
  
  Solution:
  
  Identify the Lock: Use transaction codes like SM12 (for lock entries) to identify which user or process is holding the lock. This can help you understand the source of the conflict.
  Release Locks: If you identify a lock that is no longer needed, you can manually release it using SM12. However, be cautious when doing this, as it may lead to data inconsistencies if the transaction is still in progress.
  Optimize Transactions: Review and optimize long-running transactions to ensure they complete quickly and release locks in a timely manner.
  Check Configuration: Review the configuration settings in EWM and the database to ensure they are set up correctly to minimize locking issues.
  Increase Lock Timeout: If appropriate, consider increasing the lock timeout settings to allow longer wait times for locks to be released.
  Monitor System Performance: Regularly monitor system performance and locking behavior to identify patterns that may lead to locking issues.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to locking issues in EWM for specific patches or updates that may address known issues.
  Transaction Logs: Review transaction logs to identify any patterns or frequent occurrences of the locking error.
  User Training: Ensure that users are trained on best practices for using the EWM system to minimize locking conflicts.
  System Upgrades: Consider upgrading to the latest version of SAP EWM, as newer versions may have improvements in handling locks and concurrency.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with SAP support or your system administrator for further assistance.