How To Fix OO145 - The class name &1 is not permitted for the class type you have chosen

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 145

• Message text: The class name &1 is not permitted for the class type you have chosen

What causes this issue?

Naming conventions for classes:
For a persistent class, you must use the prefix 'CL_' or the namespace
plus the prefix 'CL_' ( z.B. 'ZCL' or '/NAMESPACE/CL_' ).
For an exception class, you must use the prefix 'CX_' or the namespace
plus the prefix 'CX_' ( z.B. 'ZCX' or '/NAMESPACE/CX_' ).

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO145 - The class name &1 is not permitted for the class type you have chosen ?

  The SAP error message OO145 indicates that there is an issue with the naming convention of a class in the ABAP Object-Oriented programming environment. Specifically, it means that the class name you are trying to use is not permitted for the class type you have chosen. This typically occurs when you are trying to create a class with a name that does not conform to the naming rules set by SAP for that particular class type.
  Cause:
  
  Naming Convention Violation: The class name may not adhere to the naming conventions defined by SAP. For example, certain prefixes or suffixes may be required or prohibited based on the class type (e.g., local classes, global classes).
  Class Type Mismatch: You may be trying to create a class of a certain type (like a local class or a global class) but using a name that is not valid for that type.
  Reserved Names: The name you are trying to use might be reserved or already in use by another class or object in the system.
  
  Solution:
  
  
  Check Naming Conventions: Ensure that the class name follows the SAP naming conventions. For example:
  
  Global classes should typically start with a prefix that indicates their namespace (e.g., Z or Y).
  Local classes should have names that do not conflict with global class names.
  
  
  
  Use Valid Class Names: Choose a different name for your class that adheres to the naming rules. Avoid using special characters or reserved keywords.
  
  
  Verify Class Type: Make sure that the class type you are selecting matches the intended use of the class. For example, if you are creating a local class, ensure that the name does not conflict with global class naming rules.
  
  
  Check for Existing Classes: Use transaction SE80 or SE11 to check if a class with the same name already exists. If it does, consider renaming your new class.
  
  
  Consult Documentation: Refer to the SAP documentation or guidelines for naming conventions and class types to ensure compliance.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary) to explore existing classes and their naming conventions.
  SAP Notes: Check SAP Notes for any specific updates or changes related to class naming conventions or error OO145.
  ABAP Development Guidelines: Familiarize yourself with the ABAP development guidelines provided by SAP, which include best practices for naming and structuring your code.
  
  By following these steps, you should be able to resolve the OO145 error and successfully create your class in SAP.