How To Fix OO036 - Choose either 'Instance method' or 'Class method'

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 036

• Message text: Choose either 'Instance method' or 'Class method'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO036 - Choose either 'Instance method' or 'Class method' ?

  The SAP error message OO036, which states "Choose either 'Instance method' or 'Class method'," typically occurs in ABAP Object-Oriented programming when there is ambiguity in method calls or definitions. This error arises when the system cannot determine whether to treat a method as an instance method or a class method.
  Cause:
  
  Ambiguous Method Call: The method being called is defined in both the class and its superclass, and the system cannot determine which one to use.
  Incorrect Method Definition: The method may be defined incorrectly in the class or interface, leading to confusion about its type.
  Missing Specification: The method call does not specify whether it is an instance method (which requires an object of the class) or a class method (which can be called directly on the class itself).
  
  Solution:
  
  
  Clarify Method Call:
  
  If you are calling an instance method, ensure that you have created an instance of the class and are calling the method on that instance.
  If you intend to call a class method, ensure that you are using the correct syntax to call it directly on the class.
  
  Example:
  DATA: lo_instance TYPE REF TO your_class.
  CREATE OBJECT lo_instance.
  lo_instance->instance_method( ).  " Instance method call
  
  your_class=>class_method( ).  " Class method call
  
  
  Check Method Definitions:
  
  Review the class and its superclasses to ensure that the method is defined correctly and that there are no conflicting definitions.
  Ensure that the method is declared as either a class method (using CLASS-METHODS) or an instance method (using METHODS).
  
  
  
  Use Explicit Method Type:
  
  If the method is defined in both the class and its superclass, you can specify the class name to avoid ambiguity.
  Example:
  your_class=>method_name( ).  " Calls the class method
  lo_instance->method_name( ).  " Calls the instance method
  
  
  
  
  Related Information:
  
  Instance Methods: These methods require an instance of the class to be called. They can access instance variables and other instance methods.
  Class Methods: These methods can be called without creating an instance of the class. They can only access static variables and other class methods.
  Inheritance: If your class inherits from another class, ensure that the method definitions do not conflict with those in the superclass.
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP, including method definitions and usage.
  
  By following these guidelines, you should be able to resolve the OO036 error and clarify the method calls in your ABAP code.