How To Fix CL135 - You cannot delete this class on &

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 135

• Message text: You cannot delete this class on &

What causes this issue?

The valid-from date of the change number you entered is the same as the
current date. This is not allowed.

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?

Please use a change number with a valid-from date that falls after the
current date.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL135 - You cannot delete this class on & ?

  The SAP error message CL135 ("You cannot delete this class on &") typically occurs when you attempt to delete a class in the ABAP Workbench (transaction SE24) that is not eligible for deletion. This can happen for several reasons, including:
  Causes:
  
  
  Class is Used: The class you are trying to delete is being used in other programs, classes, or function modules. SAP does not allow the deletion of classes that are still in use to maintain data integrity and avoid breaking dependencies.
  
  
  Class is a Superclass: If the class is a superclass for other subclasses, it cannot be deleted until all subclasses are deleted or restructured.
  
  
  Transport Requests: If the class is part of a transport request that has not been released, it may prevent deletion.
  
  
  Authorization Issues: You may not have the necessary authorizations to delete the class.
  
  
  System Status: The class may be in a status that does not allow deletion, such as being locked or in a development phase.
  
  
  Solutions:
  
  
  Check Dependencies: Use transaction SE80 or SE24 to check where the class is being used. Look for references in other classes, programs, or function modules. You can use the "Where-Used List" functionality to identify dependencies.
  
  
  Remove References: If the class is being used, you will need to remove or modify the references to it in other objects before you can delete it.
  
  
  Delete Subclasses: If the class is a superclass, you will need to delete or modify all subclasses before you can delete the superclass.
  
  
  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.
  
  
  Check Authorizations: Ensure that you have the necessary authorizations to delete classes. You may need to consult with your SAP security team.
  
  
  Change Class Status: If the class is in a status that prevents deletion, you may need to change its status or unlock it.
  
  
  Related Information:
  
  Transaction Codes: SE24 (Class Builder), SE80 (Object Navigator), SE09/SE10 (Transport Organizer).
  Documentation: Refer to SAP Help documentation for more details on class management and deletion procedures.
  SAP Notes: Check for any relevant SAP Notes that may address specific issues related to class deletion.
  
  If you have addressed all the above points and still encounter issues, consider reaching out to your SAP Basis or development team for further assistance.