How To Fix /PM0/3FWTG_GENERATOR049 - Template inheritance can only be defined in the class description

SAP Error Message - Details

• Message type: E = Error

• Message class: /PM0/3FWTG_GENERATOR -

• Message number: 049

• Message text: Template inheritance can only be defined in the class description

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PM0/3FWTG_GENERATOR049 - Template inheritance can only be defined in the class description ?

  The SAP error message /PM0/3FWTG_GENERATOR049 indicates an issue related to template inheritance in the context of class definitions in the SAP system. This error typically arises when there is an attempt to define template inheritance in a way that is not allowed by the system's rules.
  Cause:
  The error occurs when:
  
  Improper Definition: Template inheritance is being defined outside of the class description. In SAP ABAP, template inheritance must be specified in the class definition section, and if it is attempted in other sections (like implementation), the system will throw this error.
  Syntax Issues: There may be syntax errors or misconfigurations in the class definition that prevent the system from recognizing the inheritance correctly.
  Version Compatibility: If you are using an older version of SAP or a specific module that does not support certain features of template inheritance, this error may arise.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Class Definition: Ensure that the template inheritance is defined correctly in the class definition section. The inheritance should be specified in the CLASS ... DEFINITION part of your ABAP code.
  Example:
  CLASS my_class DEFINITION
    INHERITING FROM my_template_class
    ...
  ENDCLASS.
  
  
  Review Syntax: Double-check the syntax of your class definition. Ensure that there are no typos or misplaced keywords that could lead to confusion in the inheritance structure.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to ensure that you are following the correct guidelines for template inheritance.
  
  
  Debugging: If the issue persists, consider debugging the code to identify the exact location and context of the error. This can help in pinpointing the problem.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or updates that might address this specific error or provide additional guidance.
  
  
  Seek Help: If you are unable to resolve the issue, consider reaching out to your SAP support team or community forums for assistance.
  
  
  Related Information:
  
  ABAP Class Definition: Understanding the structure of ABAP class definitions and the rules governing inheritance is crucial. Familiarize yourself with the ABAP Object-Oriented Programming (OOP) concepts.
  Template Classes: Learn about template classes in ABAP and how they differ from regular classes, including their use cases and limitations.
  SAP Community: Engage with the SAP Community for discussions and insights from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the error related to template inheritance in your SAP environment.