How To Fix OO613 - Constructors are not permitted in interfaces

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 613

• Message text: Constructors are not permitted in interfaces

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO613 - Constructors are not permitted in interfaces ?

  The SAP error message OO613 ("Constructors are not permitted in interfaces") occurs when you attempt to define a constructor method within an interface in ABAP (Advanced Business Application Programming). In ABAP, interfaces are meant to define a contract for classes, specifying methods that must be implemented, but they do not allow for the implementation of constructors or any other instance-specific behavior.
  Cause:
  The error is triggered when you try to declare a constructor method (using the CONSTRUCTOR keyword) inside an interface. Since interfaces are not meant to have any implementation details, including constructors, this is not allowed in ABAP.
  Solution:
  To resolve this error, you should remove the constructor definition from the interface. If you need to initialize certain values or perform setup tasks, consider the following alternatives:
  
  
  Use a Class Instead of an Interface: If you need a constructor, you might want to define a class instead of an interface. Classes can have constructors and can implement the methods defined in the interface.
  
  
  Use Factory Methods: If you want to create instances of classes that implement the interface, consider using a factory method in a separate class. This method can handle the instantiation and initialization of the objects.
  
  
  Initialization in Implementing Classes: If you have specific initialization logic, you can implement it in the constructor of the classes that implement the interface.
  
  
  Example:
  Here’s an example of how to define an interface without a constructor and a class that implements it with a constructor:
  INTERFACE if_example.
    METHODS method1.
  ENDINTERFACE.
  
  CLASS cl_example DEFINITION.
    PUBLIC SECTION.
      INTERFACES if_example.
      CONSTRUCTOR.
    PRIVATE SECTION.
      DATA: value TYPE i.
  ENDCLASS.
  
  CLASS cl_example IMPLEMENTATION.
    CONSTRUCTOR.
      value = 0. " Initialization logic
    METHOD if_example~method1.
      " Implementation of method1
    ENDMETHOD.
  ENDCLASS.
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on interfaces and classes in ABAP.
  Object-Oriented Programming in ABAP: Understanding the principles of object-oriented programming in ABAP can help you design your classes and interfaces more effectively.
  Error Handling: Familiarize yourself with common ABAP error messages and their resolutions to improve your debugging skills.
  
  By following these guidelines, you can avoid the OO613 error and design your ABAP programs more effectively.