How To Fix >0418 - Lock already exists for lock object &1

SAP Error Message - Details

• Message type: E = Error

• Message class: >0 - General Basis texts

• Message number: 418

• Message text: Lock already exists for lock object &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message >0418 - Lock already exists for lock object &1 ?

  The SAP error message 0418 ("Lock already exists for lock object &1") indicates that a lock has already been established for a specific lock object in the SAP system. This typically occurs when multiple processes or users attempt to access the same data simultaneously, and the system is enforcing data integrity by preventing concurrent access.
  Cause:
  
  Concurrent Access: Multiple transactions or programs are trying to access the same data that is protected by a lock object.
  Long-Running Transactions: A transaction may be taking too long to complete, holding the lock longer than expected.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  Improper Lock Management: The application logic may not be correctly managing locks, leading to situations where locks are not released properly.
  
  Solution:
  
  Identify the Lock: Use transaction SM12 to view and manage locks. You can check which user or process is holding the lock and decide whether to release it.
  Release the Lock: If you determine that the lock is no longer needed (e.g., the user has exited the transaction), you can manually delete the lock entry in SM12.
  Optimize Transactions: Review the code or logic of the transactions that are causing the lock. Ensure that locks are acquired and released as quickly as possible.
  Increase Timeout: If applicable, consider increasing the timeout settings for locks, but this should be done cautiously as it may lead to other issues.
  Check for Deadlocks: If you suspect a deadlock, analyze the processes involved and adjust the logic to avoid such situations.
  Consult Documentation: Review SAP documentation or notes related to the specific lock object to understand its intended use and any known issues.
  
  Related Information:
  
  Lock Objects: In SAP, lock objects are defined in the Data Dictionary (SE11) and are used to manage concurrent access to database records.
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM21: To check system logs for any related errors or warnings.
  SE11: To view or modify lock object definitions.
  
  
  Performance Monitoring: Use transaction ST22 to check for dumps that may indicate issues related to locks or performance.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.