How To Fix CL518 - Class type & : class & locked by user &

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 518

• Message text: Class type & : class & locked by user &

What causes this issue?

You want to edit the allocation to a class. This requires that the
class is not changed in the meantime. However, another user is already
processing the class or its allocation.

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?

Try again later.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL518 - Class type & : class & locked by user & ?

  The SAP error message CL518 indicates that a class type (usually a class in ABAP) is locked by a specific user. This typically occurs when a user is editing or has opened a class for modification, preventing other users from making changes to it simultaneously. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  User Lock: The class is currently being edited by another user, which locks the class for editing.
  Transaction in Progress: A transaction that involves the class is still in progress, leading to a lock.
  System Error: Occasionally, a system error or an improper termination of a session can leave a lock in place.
  
  Solution:
  
  Wait for Release: If the class is locked by another user, the simplest solution is to wait until that user has finished their work and released the lock.
  Identify the Lock:
  
  Use transaction SM12 to view and manage locks. You can check which user has locked the class and the details of the lock.
  If the user is no longer active or the lock seems to be stale, you can consider removing the lock.
  
  
  Remove the Lock:
  
  If you have the necessary authorizations, you can delete the lock entry in SM12. Be cautious with this approach, as it may disrupt the work of the user who has the lock.
  
  
  Check for Background Jobs: Sometimes, background jobs may hold locks. Check transaction SM37 to see if any jobs are running that might be holding the lock.
  Contact the User: If you can identify the user who has the lock, you may want to contact them to see if they can release it.
  
  Related Information:
  
  Lock Management: Understanding how SAP handles locks is crucial. Locks are used to maintain data integrity and prevent conflicts during concurrent access.
  Authorization: Ensure you have the necessary authorizations to view and manage locks in the system.
  Development Guidelines: In a development environment, it’s good practice to avoid long sessions of editing classes to minimize locking issues. Use version control systems where possible.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to class locking or provide additional troubleshooting steps.
  
  If the problem persists or if you are unsure about removing locks, it may be best to consult with your SAP Basis team or a system administrator for further assistance.