How To Fix MC660 - Lock object & activated

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 660

• Message text: Lock object & activated

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 MC660 - Lock object & activated ?

  The SAP error message MC660 typically indicates that a lock object is activated, which prevents certain operations from being performed on the data. This error is often encountered in the context of inventory management or material management modules when there is a conflict due to data being locked by another process or user.
  Cause:
  
  Locking Mechanism: SAP uses a locking mechanism to ensure data integrity. When a user or process is accessing a particular piece of data, it may lock that data to prevent other users from making changes simultaneously.
  Concurrent Access: If multiple users or processes attempt to access the same data at the same time, one may lock the data, leading to this error for others trying to access it.
  Long-running Transactions: If a transaction takes too long to complete, it can hold locks longer than expected, causing other transactions to fail with this error.
  System Configuration: Sometimes, the configuration of the lock objects or the way they are implemented in custom programs can lead to this error.
  
  Solution:
  
  Identify the Lock: Use transaction code SM12 to check for active locks. You can see which user or process is holding the lock and what data is being locked.
  Release the Lock: If you have the necessary permissions, you can manually delete the lock entry in SM12. However, be cautious with this approach, as it may lead to data inconsistencies if the process holding the lock is still running.
  Wait and Retry: If the lock is held by a legitimate process, it may be best to wait for that process to complete and then retry your operation.
  Optimize Transactions: If you frequently encounter this error, consider optimizing the transactions that are causing locks. This may involve reducing the time taken for transactions or breaking them into smaller parts.
  Review Custom Code: If the error is related to custom programs, review the code to ensure that locks are being managed properly and that they are released in a timely manner.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: To view and manage lock entries.
  SM21: To check system logs for any related issues.
  ST22: To check for dumps that might provide more context on the error.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message MC660.
  Documentation: Review SAP documentation on locking mechanisms and best practices for managing locks in SAP systems.
  
  If the problem persists after trying the above solutions, it may be necessary to consult with your SAP Basis team or SAP support for further assistance.