How To Fix R7518 - Table &1 is currently locked by user &2

SAP Error Message - Details

• Message type: E = Error

• Message class: R7 - BW: Data basis

• Message number: 518

• Message text: Table &1 is currently locked by user &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message R7518 - Table &1 is currently locked by user &2 ?

  The SAP error message R7518 indicates that a specific table (denoted as &1) is currently locked by a user (denoted as &2). This typically occurs when a user is performing an operation that requires exclusive access to the table, and another user or process is trying to access it simultaneously.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing or modifying the table, leading to a lock.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock on the table longer than expected.
  Uncommitted Changes: If a user has made changes to the table but has not yet committed those changes, the table remains locked.
  Deadlocks: In some cases, a deadlock situation may arise where two or more processes are waiting for each other to release locks.
  
  Solution:
  
  Wait and Retry: Often, the simplest solution is to wait for the other user to complete their transaction and release the lock. You can retry the operation after a short period.
  Identify the Lock: Use transaction codes like SM12 (Display and Manage Locks) to identify which user is holding the lock on the table. You can see the details of the lock and the user who is causing it.
  Terminate the Lock: If you have the necessary authorizations, you can manually delete the lock entry in SM12. However, this should be done with caution, as it may lead to data inconsistencies if the other user is in the middle of a transaction.
  Check for Long-Running Transactions: Use transaction SM66 (Global Work Process Overview) to check for long-running transactions that may be holding locks.
  Review Application Logic: If this error occurs frequently, review the application logic to ensure that transactions are being committed or rolled back appropriately and that locks are being released in a timely manner.
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks is crucial. SAP uses a locking mechanism to ensure data integrity during concurrent access.
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM66: To monitor active processes and their statuses.
  SM21: To check system logs for any related errors or warnings.
  
  
  Performance Tuning: If locks are a frequent issue, consider performance tuning of the application or database to reduce the time transactions take to complete.
  
  Always ensure that any actions taken to resolve locking issues are in line with your organization's policies and procedures, especially when it comes to terminating user sessions or modifying locks.