How To Fix NGC_CORE_DB008 - Class type &1 object &2 cannot be locked: already locked

SAP Error Message - Details

• Message type: E = Error

• Message class: NGC_CORE_DB - Message class for Conversion reports

• Message number: 008

• Message text: Class type &1 object &2 cannot be locked: already locked

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

The conversion of the current package is aborted.

How to fix this error?

Unlock the table entry (other application is locking it at the moment)
and run the conversion again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message NGC_CORE_DB008 - Class type &1 object &2 cannot be locked: already locked ?

  The SAP error message NGC_CORE_DB008 indicates that a specific object (identified by its class type and object name) cannot be locked because it is already locked by another process. This is a common issue in SAP systems, particularly in environments where multiple users or processes are trying to access or modify the same object simultaneously.
  Cause:
  
  Concurrent Access: Another user or process is currently accessing or modifying the object, which prevents your session from obtaining a lock on it.
  Long-Running Transactions: A transaction that takes a long time to complete may hold a lock on the object longer than expected.
  Deadlocks: In some cases, a deadlock situation may occur where two or more processes are waiting for each other to release locks.
  System Configuration: Certain configurations or settings in the SAP system may lead to unexpected locking behavior.
  
  Solution:
  
  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 code SM12 to check for existing locks. You can see which user or process is holding the lock on the object.
  Release the Lock: If you have the necessary authorizations, you can manually delete the lock entry in SM12. However, be cautious with this approach, as it may lead to data inconsistencies if the other process is still active.
  Check for Long-Running Transactions: Investigate if there are any long-running transactions that are holding locks. You can use transaction SM66 to monitor active processes.
  Review Code: If this error occurs frequently, review the code or processes that access the object to ensure they are designed to handle locking appropriately.
  Consult Basis Team: If the issue persists, it may be necessary to involve your SAP Basis team to analyze the locking behavior and system performance.
  
  Related Information:
  
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM66: Monitor global work processes.
  SM21: Check system logs for any related errors or warnings.
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to locking behavior in your specific version of SAP.
  Documentation: Review SAP documentation on database locking and transaction management for best practices.
  
  By following these steps, you should be able to diagnose and resolve the NGC_CORE_DB008 error effectively.