How To Fix CL159 - Class type &: & & is in use; note the change to the status

CL159 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 159

• Message text: Class type &: & & is in use; note the change to the status

What causes this issue?

Class &V3& of class type &V1& is used in configuration parameters of
variants.

System Response

Any status change can cause inconsistencies.

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?

<DS:REPO.RCCUCL00>Proceed</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.

CL159 - Details

• The SAP error message CL159 indicates that a class type (in this case, a class or interface) is currently in use, and therefore, you cannot make changes to its status. This typically occurs when you attempt to modify a class or interface that is being referenced or used in other parts of the system, such as in programs, function modules, or other classes.
  
  Cause:
  
  Active Usage: The class or interface is actively being used in the system, which prevents changes to its status.
  Dependencies: There may be dependencies on the class or interface that need to be resolved before changes can be made.
  Transport Requests: If the class is part of a transport request that is currently being processed, it may be locked for changes.
  
  
  Solution:
  
  Check Usage: Identify where the class or interface is being used. You can use transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary) to find references to the class.
  Deactivate