How To Fix C4201 - Subordinate class "&" is locked

C4201 - Overview

• Message type: E = Error

• Message class: C4 - CTMS_SYNTAX_CHECK

• Message number: 201

• Message text: Subordinate 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 part of the
hierarchy.

Error message extract from SAP system. Copyright SAP SE.

C4201 - Details

• The SAP error message C4201 indicates that a subordinate class is locked, which typically occurs in the context of class or object-oriented programming within the SAP ABAP environment. This error can arise when you attempt to modify or access a class that is currently locked for editing or has been locked by another user or process.
  
  Cause:
  
  Lock by Another User: 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.
  Development Lock: The class might be locked in the development environment due to a development lock set by the system.
  System Lock: The system may have a temporary lock due to a background job or other processes.
  
  
  Solution:
  
  
  Check Lock Status:
  
  Use transaction code SM12 to check for locks on the class. You can search for the class name to see if it is locked and