How To Fix CL089 - Internal class type & cannot be used in class maintenance

CL089 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 089

• Message text: Internal class type & cannot be used in class maintenance

What causes this issue?

You are using an internal class type. This is not allowed in class
maintenance functions.

How to fix this error?

Please switch to another class type using the <LS>Change class type</>
function.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL089 - Internal class type & cannot be used in class maintenance ?

  The SAP error message CL089 indicates that there is an issue with the use of an internal class type in class maintenance. This typically occurs when you are trying to create or modify a class in the ABAP Workbench, and the system has detected that the class type you are trying to use is not valid for the operation you are attempting.
  
  Cause:
  
  Internal Class Type: The error usually arises when you are trying to use a class that is defined as an internal class type (e.g., a class that is not intended for external use or is defined within another class).
  Incorrect Class Definition: The class you are trying to maintain may not be properly defined or may be a local class that cannot be accessed in the context you are working in.
  Namespace Issues: If the class is defined in a different namespace or package that is not accessible, it can lead