How To Fix LCA_LCK104 - A lock conflict occurred

SAP Error Message - Details

• Message type: E = Error

• Message class: LCA_LCK - Error Texts for the Lock Server Module

• Message number: 104

• Message text: A lock conflict occurred

What causes this issue?

The requested lock could not be granted, since another user has already
been granted a lock that is in the same lock area iv_area, and whose
characteristic selections overlap with those requested. In the case of a
conflict, the existing lock is returned using the parameter es_conflict.

System Response

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

How to fix this error?

Wait until the lock in conflict has been canceled, or change your
characteristics selection.

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 LCA_LCK104 - A lock conflict occurred ?

  The SAP error message LCA_LCK104 indicates that a lock conflict has occurred, which typically means that a resource (such as a document, record, or transaction) is currently being accessed or modified by another user or process. This can happen in various scenarios, such as when multiple users attempt to edit the same data simultaneously.
  Causes of LCA_LCK104
  
  Concurrent Access: Multiple users or processes are trying to access or modify the same data at the same time.
  Long-running Transactions: A transaction that takes a long time to complete can hold locks longer than expected, causing conflicts for other users.
  Improper Lock Management: Issues with how locks are managed in the system, such as not releasing locks properly after a transaction is completed.
  System Configuration: Configuration settings that affect how locks are handled in the SAP system.
  
  Solutions to LCA_LCK104
  
  
  Wait and Retry: Often, simply waiting for a few moments and then retrying the operation can resolve the issue, as the lock may be released once the other user or process completes their transaction.
  
  
  Identify the Lock: Use transaction codes like SM12 (Display and Delete Locks) to identify which user or process is holding the lock. You can then communicate with that user to resolve the conflict.
  
  
  Check for Long-running Transactions: Use transaction codes like SM66 (Global Work Process Overview) to monitor active processes and identify any long-running transactions that may be causing locks.
  
  
  Optimize Transactions: If certain transactions are frequently causing lock conflicts, consider optimizing them to reduce their execution time.
  
  
  Lock Management Configuration: Review and adjust the lock management settings in your SAP system if necessary. This may involve consulting with your SAP Basis team.
  
  
  User Training: Ensure that users are trained on how to properly manage transactions to minimize lock conflicts.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM12: To view and manage locks.
  SM66: To monitor active processes.
  SM21: To check system logs for any related issues.
  
  
  
  SAP Notes: Check SAP Notes for any specific patches or updates related to lock management or the specific error message.
  
  
  Documentation: Review SAP documentation on lock management and concurrency control for best practices.
  
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or SAP support for further investigation.