How To Fix C4200 - Class "&" is locked

C4200 - Overview

• Message type: E = Error

• Message class: C4 - CTMS_SYNTAX_CHECK

• Message number: 200

• Message text: Class "&" is locked

What causes this issue?

The class you entered is part of a class hierarchy or network. The
superior class &v1& is currently locked.
This means that it is not possible to assign values to characteristics.
You can display values already assigned, but changes are not allowed.
This has to be the case to avoid inconsistencies in the hierarchy or
network.

System Response

How to fix this error?

Wait until your colleague has finished working with this branch of the
hierarchy.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C4200 - Class "&" is locked ?

  The SAP error message C4200, which states "Class '&' is locked," typically occurs when you attempt to modify or access a class in the ABAP Workbench that is currently locked by another user or process. This locking mechanism is in place to prevent simultaneous changes that could lead to inconsistencies or data corruption.
  
  Cause:
  
  User Lock: Another user is currently editing the class or has it locked for some reason.
  Transport Lock: The class may be locked due to a transport request that is currently being processed.
  System Lock: The system may have a temporary lock due to a previous session that did not close properly.
  
  
  Solution:
  
  
  Check Lock Status:
  
  Use transaction code SM12 to check for locks. You can filter by the object type (e.g., class) and the name of the class to see if it is locked by another user.
  If you find that the class is locked by another user, you can contact that user