How To Fix OO123 - The naming convention for classes is 'CL_'

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 123

• Message text: The naming convention for classes is 'CL_'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO123 - The naming convention for classes is 'CL_' ?

  The SAP error message OO123 indicates that there is a violation of the naming convention for classes in ABAP Object-Oriented programming. Specifically, it states that the naming convention for classes should start with the prefix 'CL_'.
  Cause:
  The error occurs when you attempt to create or activate a class that does not adhere to the required naming convention. In SAP, classes are expected to follow specific naming standards to ensure consistency and clarity in the codebase. The prefix 'CL_' is used to denote that the object is a class.
  Solution:
  To resolve this error, you need to rename the class to comply with the naming convention. Here are the steps to do this:
  
  
  Open the Class Definition: Go to the ABAP Workbench (transaction SE80 or SE24) and locate the class that is causing the error.
  
  
  Rename the Class: Change the name of the class to start with 'CL_'. For example, if your class is named MyClass, you should rename it to CL_MyClass.
  
  
  Adjust References: If the class is referenced elsewhere in your code, make sure to update those references to the new class name.
  
  
  Activate the Class: After renaming, activate the class to ensure that the changes take effect.
  
  
  Check for Other Naming Conventions: Ensure that the rest of your class name follows SAP's naming conventions, which typically include using uppercase letters and underscores for separation.
  
  
  Related Information:
  
  Naming Conventions: SAP has specific naming conventions for various objects (e.g., function modules, data elements, tables). Familiarizing yourself with these conventions can help prevent similar errors in the future.
  Documentation: Refer to the SAP documentation or guidelines for ABAP programming to understand best practices and naming conventions.
  Error Handling: If you encounter similar errors in the future, check the error message number (in this case, OO123) in the SAP system for more details and context.
  
  By following these steps, you should be able to resolve the OO123 error and ensure that your class names conform to SAP's standards.