How To Fix ENHANCEMENT126 - Class name &1 for generated class already defined in the DDIC

SAP Error Message - Details

• Message type: E = Error

• Message class: ENHANCEMENT - SAP customer enhancement project messages

• Message number: 126

• Message text: Class name &1 for generated class already defined in the DDIC

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message ENHANCEMENT126 - Class name &1 for generated class already defined in the DDIC ?

  The SAP error message ENHANCEMENT126 indicates that there is a conflict with a class name that has already been defined in the Data Dictionary (DDIC). This typically occurs when you are trying to create or generate a class that has the same name as an existing class in the system.
  Cause:
  
  
  Class Name Conflict: The class name you are trying to use for your enhancement or generated class already exists in the DDIC. This can happen if:
  
  You are trying to enhance a standard class and the enhancement is using a name that is already taken.
  There is a naming collision with a custom class or a class from another package.
  
  
  
  Namespace Issues: If you are working in a system with multiple namespaces, it is possible that the class name is defined in a different namespace.
  
  
  Solution:
  
  
  Check Existing Classes: 
  
  Use transaction code SE80 (Object Navigator) or SE11 (Data Dictionary) to search for the class name in question. This will help you identify if the class already exists and where it is defined.
  
  
  
  Rename Your Class: 
  
  If you find that the class name is already in use, consider renaming your class to something unique. Ensure that the new name adheres to the naming conventions and does not conflict with existing classes.
  
  
  
  Use a Different Namespace: 
  
  If applicable, consider using a different namespace for your custom classes to avoid conflicts with standard SAP classes or classes from other developers.
  
  
  
  Check for Enhancements: 
  
  If you are enhancing a standard class, ensure that you are using the correct enhancement framework and that your enhancement does not conflict with existing enhancements.
  
  
  
  Transport Requests: 
  
  If you are working in a development environment, ensure that any transport requests related to the existing class have been properly imported into your system.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  SE80: Object Navigator
  SE11: Data Dictionary
  SE24: Class Builder
  SE37: Function Module
  SE38: ABAP Editor
  
  
  
  Documentation: 
  
  Review SAP documentation on class creation and enhancement to understand best practices and naming conventions.
  
  
  
  SAP Notes: 
  
  Check for any relevant SAP Notes that might address specific issues related to class naming and enhancements.
  
  
  
  By following these steps, you should be able to resolve the ENHANCEMENT126 error and successfully create or enhance your class in SAP.