How To Fix /IWFND/CM_DM042 - Table '&1' already locked

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_DM -

• Message number: 042

• Message text: Table '&1' already locked

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_DM042 - Table '&1' already locked ?

  The SAP error message /IWFND/CM_DM042 Table '&1' already locked typically occurs in the context of the SAP Gateway or OData services when there is an attempt to modify or access a database table that is already locked by another transaction. This can happen in various scenarios, such as during data updates, when multiple users or processes are trying to access the same resource simultaneously.
  Cause:
  
  Concurrent Access: Another transaction or user is currently accessing or modifying the same table, leading to a lock.
  Long-Running Transactions: A transaction that takes a long time to complete can hold a lock on the table for an extended period.
  Deadlocks: In some cases, deadlocks can occur if two transactions are waiting for each other to release locks.
  Uncommitted Transactions: If a transaction is not committed or rolled back properly, it can leave a lock on the table.
  
  Solution:
  
  Identify the Lock: Use transaction codes like SM12 (for lock entries) to identify which user or process is holding the lock on the table.
  Wait and Retry: If the lock is temporary, waiting for the other transaction to complete may resolve the issue.
  Terminate the Lock: If necessary, you can manually delete the lock entry in SM12, but this should be done with caution as it may lead to data inconsistency.
  Optimize Transactions: Review and optimize the code or processes that are locking the table to ensure they complete quickly and release locks promptly.
  Implement Retry Logic: If applicable, implement retry logic in your application to handle transient locking issues gracefully.
  Check for Deadlocks: Monitor for deadlocks and resolve them by analyzing the involved transactions and adjusting their logic.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: Check system logs for any related errors or warnings.
  ST22: Analyze short dumps that may provide insights into the issue.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message.
  Performance Monitoring: Use tools like ST03N to monitor performance and identify long-running transactions that may be causing locks.
  
  Best Practices:
  
  Ensure that transactions are kept as short as possible to minimize locking issues.
  Use appropriate isolation levels in your database transactions.
  Regularly review and optimize database access patterns in your applications.
  
  By following these steps, you should be able to diagnose and resolve the /IWFND/CM_DM042 Table '&1' already locked error in SAP.