How To Fix CL004 - Class type &: & & already created in language "&"

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 004

• Message text: Class type &: & & already created in language "&"

What causes this issue?

&V2& &V3& has been created with class type &V1& in language &V4&, but
has not yet been created in your logon language.

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 note that the default language-dependent data you see may need
to be translated.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL004 - Class type &: & & already created in language "&" ?

  The SAP error message CL004 indicates that a class type has already been created in a specific language. This error typically occurs when you attempt to create a class that already exists in the system, and it is often related to the Object-Oriented Programming (OOP) features in SAP ABAP.
  Cause:
  
  Class Already Exists: The primary cause of this error is that a class with the same name and type has already been created in the specified language.
  Language-Specific Class: SAP allows classes to be defined in multiple languages, and if a class has already been created in the specified language, you cannot create it again.
  Development Environment: This error may also occur if you are working in a development environment where the class was created by another developer or in a different transport request.
  
  Solution:
  
  Check Existing Classes: Before creating a new class, check if the class already exists in the system. You can do this by using transaction code SE24 (Class Builder) and searching for the class name.
  Use Existing Class: If the class already exists, consider using the existing class instead of creating a new one. You can extend or modify the existing class if necessary.
  Change Language Settings: If you need to create a class in a different language, ensure that you are using the correct language settings in your SAP session.
  Delete or Rename: If you have the necessary authorizations and the class is not needed, you can delete the existing class or rename it to avoid the conflict.
  Transport Requests: If the class was created in a different transport request, ensure that the transport request is released and imported into your current environment.
  
  Related Information:
  
  Transaction Codes: 
  
  SE24: Class Builder
  SE80: Object Navigator
  
  
  Documentation: Refer to SAP Help documentation for Object-Oriented Programming in ABAP for more details on class creation and management.
  SAP Notes: Check SAP Notes for any specific issues or patches related to class creation errors.
  
  By following these steps, you should be able to resolve the CL004 error and successfully manage your classes in SAP.