How To Fix CL145 - Class type &: & & is in use and cannot be deleted

CL145 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 145

• Message text: Class type &: & & is in use and cannot be deleted

What causes this issue?

This class is used in
<DS:GLOS.object_dependencies>object_dependencies</> and cannot be
deleted.

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?

In some dependency types, for example in
<DS:GLOS.constraint>constraints</>, you can access objects via the
class to which they are allocated. Once you have specified the class in
one of these dependencies, you can no longer delete it.

Error message extract from SAP system. Copyright SAP SE.

CL145 - Details

• The SAP error message CL145 indicates that a class type (usually a class or interface) is currently in use and cannot be deleted. This typically occurs when there are dependencies or references to the class in other parts of the system, such as in other classes, programs, or even in the configuration.
  
  Cause:
  
  Active References: The class or interface you are trying to delete is being referenced by other objects (e.g., methods, other classes, or programs).
  Inheritance: If the class is a superclass or is being inherited by other classes, it cannot be deleted until those dependencies are resolved.
  Active Implementations: If the class is implemented in any active business logic or is part of a running application, it cannot be deleted.
  Transport Requests: If the class is part of a transport request that is still in use or has not been released, it may also prevent deletion.
  
  
  Solution:
  
  
  Identify Dependencies: Use transaction codes like SE80 (Object