How To Fix CL181 - Class names & not allowed, because class is generated with prefix &.

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 181

• Message text: Class names & not allowed, because class is generated with prefix &.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CL181 - Class names & not allowed, because class is generated with prefix &. ?

  The SAP error message CL181 indicates that there is an issue with the naming convention of a class in ABAP (Advanced Business Application Programming). Specifically, the error message states that class names are not allowed because the class is generated with a specific prefix.
  Cause:
  The error typically arises due to the following reasons:
  
  
  Naming Convention Violation: In SAP, certain prefixes are reserved for system-generated classes or classes that are part of the SAP standard. If you attempt to create a class with a name that starts with a reserved prefix, you will encounter this error.
  
  
  Class Generation: The class you are trying to create or use may have been generated automatically by the system, and its name may not conform to the naming conventions expected by the ABAP environment.
  
  
  Namespace Issues: If you are working in a system that uses namespaces, the class name may conflict with existing classes or reserved names in the namespace.
  
  
  Solution:
  To resolve the CL181 error, you can take the following steps:
  
  
  Rename the Class: Change the name of the class to ensure it does not start with a reserved prefix. Follow the naming conventions set by your organization or SAP guidelines.
  
  
  Check Prefixes: Review the prefixes used in your SAP system. Common prefixes that may be reserved include those starting with "Z" or "Y" for custom developments, but you should verify against your specific system's guidelines.
  
  
  Use Transaction SE80: Use the Object Navigator (transaction SE80) to check the class definition and ensure that it adheres to the naming conventions.
  
  
  Review Documentation: Consult the SAP documentation or your organization's development guidelines to understand the naming conventions and reserved prefixes.
  
  
  Namespace Configuration: If you are working in a namespace, ensure that your class name does not conflict with existing classes in that namespace.
  
  
  Related Information:
  
  ABAP Naming Conventions: Familiarize yourself with the naming conventions for classes, methods, and other objects in ABAP to avoid similar issues in the future.
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions related to this error.
  Development Guidelines: Review your organization's development guidelines to ensure compliance with naming conventions and best practices.
  
  By following these steps, you should be able to resolve the CL181 error and successfully create or modify your ABAP class.