How To Fix EU346 - You cannot use internal subroutines in a global class

SAP Error Message - Details

• Message type: E = Error

• Message class: EU - Development Environment

• Message number: 346

• Message text: You cannot use internal subroutines in a global class

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message EU346 - You cannot use internal subroutines in a global class ?

  The SAP error message EU346, which states "You cannot use internal subroutines in a global class," typically occurs when you attempt to define internal subroutines (also known as FORM routines) within a global class in ABAP (Advanced Business Application Programming). In ABAP, global classes are part of the object-oriented programming paradigm, and they do not support the use of procedural programming constructs like internal subroutines.
  Cause:
  The error arises because:
  
  Internal subroutines (defined using the FORM keyword) are only allowed in procedural programs or local classes.
  Global classes are designed to encapsulate methods and attributes in an object-oriented manner, and they should use methods instead of internal subroutines.
  
  Solution:
  To resolve this error, you should replace the internal subroutines with methods. Here’s how you can do that:
  
  
  Define Methods: Instead of using FORM to define subroutines, define methods within your global class. For example:
  CLASS my_class DEFINITION.
    PUBLIC SECTION.
      METHODS: my_method.
  ENDCLASS.
  
  CLASS my_class IMPLEMENTATION.
    METHOD my_method.
      " Your code here
    ENDMETHOD.
  ENDCLASS.
  
  
  Call Methods: When you need to call the functionality that was previously in the internal subroutine, call the method instead. For example:
  DATA(lo_my_class) = NEW my_class( ).
  lo_my_class->my_method( ).
  
  
  Related Information:
  
  Object-Oriented Programming in ABAP: Familiarize yourself with the principles of object-oriented programming in ABAP, including classes, methods, attributes, and inheritance.
  ABAP Documentation: Refer to the official SAP documentation for more details on defining classes and methods in ABAP.
  Best Practices: When transitioning from procedural to object-oriented programming, consider refactoring your code to take full advantage of encapsulation, inheritance, and polymorphism.
  
  By following these steps, you should be able to eliminate the EU346 error and properly structure your code using object-oriented principles in ABAP.