How To Fix CL144 - The class is in use

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 144

• Message text: The class is in use

What causes this issue?

You have changed the status of a class to a status that does not allow
classification with this class.
However, this class is already in use in
<DS:GLOS.variant_configuration>variant configuration</> in one the
following ways:
The class is used as a class item in BOMs of
<DS:GLOS.configurable_material>configurable materials</>.
The class is used in <DS:GLOS.object_dependencies>object
dependencies</>. In this context, a class can be used to access an
object via the class to which it is allocated.
A configurable material has been allocated to the class in the
<DS:GLOS.configuration_profile>configuration profile</>.
Any change you make to the status may lead to inconsistencies or
prevent you from using the class again for these purposes.

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

System Response

How to fix this error?

Please check whether you really want to make this change.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL144 - The class is in use ?

  The SAP error message CL144 ("The class is in use") typically occurs when you attempt to delete or modify a class that is currently being used in the system. This can happen in various scenarios, such as when the class is being referenced in other objects (like methods, interfaces, or other classes) or if it is part of a transport request that is still active.
  Cause:
  
  Active References: The class is being referenced by other classes, methods, or programs.
  Transport Requests: The class is part of a transport request that has not been released or is still in use.
  Locking Mechanism: The class might be locked by another user or process, preventing modifications.
  
  Solution:
  
  
  Check References: 
  
  Use transaction code SE80 (Object Navigator) or SE11 (Data Dictionary) to check for references to the class. Look for any dependent objects that might be using the class.
  You can also use the "Where-Used List" feature (Shift + F3) to find where the class is being used.
  
  
  
  Release Transport Requests: 
  
  If the class is part of a transport request, ensure that the request is released. You can check this in transaction SE09 or SE10.
  
  
  
  Unlock the Class: 
  
  If the class is locked, you may need to wait for the lock to be released or contact your system administrator to unlock it.
  
  
  
  Modify or Delete: 
  
  Once you have ensured that there are no active references and the transport request is released, you should be able to modify or delete the class without encountering the error.
  
  
  
  Check for Active Sessions: 
  
  Sometimes, the class might be in use in another session. Ensure that no other users are currently working with the class.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SE80 (Object Navigator)
  SE11 (Data Dictionary)
  SE09/SE10 (Transport Organizer)
  SE37 (Function Module)
  SE24 (Class Builder)
  
  
  
  Documentation: 
  
  SAP Help Portal and SAP Notes can provide additional insights and troubleshooting steps related to class management and error handling.
  
  
  
  SAP Community: 
  
  Engaging with the SAP Community can provide insights from other users who may have encountered similar issues.
  
  
  
  By following these steps, you should be able to resolve the CL144 error and proceed with your development tasks in SAP.