How To Fix G3543 - Lock mode entry already exists - no change necessary

SAP Error Message - Details

• Message type: E = Error

• Message class: G3 - Messages for SAP Consolidation: Integration

• Message number: 543

• Message text: Lock mode entry already exists - no change necessary

What causes this issue?

A lock mode entry already exists for the entered parameter.

System Response

Therefore no changes to the Customizing settings are necessary.

How to fix this error?

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

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 G3543 - Lock mode entry already exists - no change necessary ?

  The SAP error message G3543 ("Lock mode entry already exists - no change necessary") typically occurs in the context of lock management in SAP, particularly when dealing with lock objects. This error indicates that an attempt was made to set a lock mode that is already in place for a particular object, and therefore, no changes are necessary.
  Cause:
  
  Duplicate Lock Request: The error usually arises when a program or transaction tries to set a lock on an object that is already locked in the same mode. For example, if a transaction tries to lock a record in "exclusive" mode while it is already locked in "exclusive" mode, this error will be triggered.
  Concurrency Control: This is part of SAP's concurrency control mechanism to prevent deadlocks and ensure data integrity. If a lock is already established, the system will not allow a redundant request.
  
  Solution:
  
  Check Lock Status: Use transaction code SM12 to check the current locks on the object. This will help you identify if the lock is indeed already in place.
  Review Code Logic: If you are developing or maintaining custom code, review the logic to ensure that locks are only requested when necessary. Avoid redundant lock requests.
  Error Handling: Implement error handling in your code to gracefully manage situations where a lock request fails due to existing locks.
  Transaction Management: Ensure that transactions are properly managed and that locks are released when they are no longer needed. This can help prevent unnecessary lock requests.
  Consult Documentation: Review SAP documentation or notes related to lock management for best practices and guidelines.
  
  Related Information:
  
  Lock Objects: In SAP, lock objects are used to manage concurrent access to data. They ensure that data integrity is maintained when multiple users or processes attempt to access the same data simultaneously.
  Transaction Codes:
  
  SM12: Display and manage lock entries.
  SM21: Check system logs for any related issues.
  SE11: View and manage lock objects in the Data Dictionary.
  
  
  SAP Notes: Check for any relevant SAP Notes that may address specific scenarios or bugs related to lock management.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.