How To Fix /SCWM/TM029 - Lock object &1 called for &2 in mode &3 with parameters &4

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/TM -

• Message number: 029

• Message text: Lock object &1 called for &2 in mode &3 with parameters &4

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SCWM/TM029 - Lock object &1 called for &2 in mode &3 with parameters &4 ?

  The SAP error message /SCWM/TM029 typically relates to a lock object issue in the SAP Extended Warehouse Management (EWM) system. This error occurs when a lock object is being accessed in a mode that is incompatible with the current state of the system or when there is a contention for the lock by multiple processes.
  Cause:
  
  Lock Contention: The error usually indicates that another transaction or process is currently holding the lock on the specified object, preventing the current transaction from acquiring it.
  Long-running Transactions: If a transaction takes too long to complete, it may hold locks longer than expected, leading to contention.
  Incorrect Lock Mode: The mode in which the lock is being requested may not be appropriate for the operation being performed (e.g., trying to acquire an exclusive lock when a shared lock is needed).
  System Configuration Issues: There may be configuration issues in the EWM system that lead to improper handling of lock objects.
  
  Solution:
  
  Identify the Lock Holder: Use transaction codes like SM12 to check for existing locks and identify which user or process is holding the lock. You can then decide whether to wait for the lock to be released or to terminate the process holding the lock if appropriate.
  Optimize Long-running Transactions: Review and optimize any long-running transactions that may be holding locks unnecessarily. This may involve improving performance or breaking down large transactions into smaller ones.
  Review Lock Modes: Ensure that the correct lock mode is being used for the operation. If you are developing or customizing processes, verify that the lock modes are appropriate for the intended operations.
  System Monitoring: Implement monitoring to track lock contention and performance issues in the EWM system. This can help identify patterns and potential areas for improvement.
  Consult SAP Notes: Check for any relevant SAP Notes that may address known issues related to this error message. SAP frequently releases updates and patches that can resolve specific problems.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SM12 (to view and manage locks), SM21 (to check system logs), and ST22 (to analyze dumps) for troubleshooting.
  SAP Documentation: Review SAP documentation related to lock management and EWM to understand how locks are handled in the system.
  Performance Tuning: Consider performance tuning for your EWM processes to minimize lock contention and improve overall system efficiency.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with SAP support for further assistance.