How To Fix MDC_GW021 - Record already locked

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_GW - Gateway implementation related messages

• Message number: 021

• Message text: Record 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 MDC_GW021 - Record already locked ?

  The SAP error message MDC_GW021, which states "Record already locked," typically occurs when a user attempts to modify or delete a record that is currently locked by another user or process. This locking mechanism is a part of SAP's concurrency control to ensure data integrity and prevent conflicts when multiple users are accessing the same data simultaneously.
  Causes:
  
  Concurrent Access: Another user or process is currently editing or has locked the record.
  Long-running Transactions: A transaction that takes a long time to complete may hold a lock on the record longer than expected.
  Background Jobs: A background job may be processing the record, causing it to be locked.
  Uncommitted Transactions: If a transaction is not committed or rolled back properly, it may leave the record in a locked state.
  System Issues: Occasionally, system issues or bugs can lead to records being locked unexpectedly.
  
  Solutions:
  
  Wait and Retry: If the lock is temporary, waiting for a few moments and then retrying the operation may resolve the issue.
  Identify the Lock: Use transaction codes like SM12 (Display and Manage Locks) to identify which user or process is holding the lock on the record. You can check the lock entries and see if you can contact the user or process to release the lock.
  Release 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 still working on the record.
  Check Background Jobs: Use transaction SM37 to check if any background jobs are running that might be locking the record. If necessary, you can stop the job if it is safe to do so.
  Review Transaction Logic: If the issue is recurring, review the logic of the transactions to ensure that locks are being managed properly and that transactions are being committed or rolled back as needed.
  Consult with Basis Team: If the issue persists, it may be necessary to consult with your SAP Basis team to investigate any underlying system issues or to check for any known bugs or patches.
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks can help in troubleshooting. SAP uses different types of locks (e.g., exclusive locks, shared locks) based on the operation being performed.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM12 (to view locks), SM21 (to view system logs), and SM37 (to monitor background jobs).
  User Training: Ensure that users are trained on how to properly handle transactions to minimize locking issues, such as committing changes promptly and avoiding long-running transactions when possible.
  
  By following these steps, you should be able to diagnose and resolve the MDC_GW021 error effectively.