How To Fix OO122 - Class &1 set to abstract

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 122

• Message text: Class &1 set to abstract

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO122 - Class &1 set to abstract ?

  The SAP error message OO122 indicates that a class has been defined as abstract, which means it cannot be instantiated directly. This error typically arises when there is an attempt to create an instance of an abstract class, which is not allowed in object-oriented programming.
  Cause:
  
  Abstract Class Definition: The class in question has been defined with the ABSTRACT keyword in its definition. This is a design choice in object-oriented programming to prevent direct instantiation of classes that are meant to serve as base classes.
  Incorrect Instantiation: The error occurs when there is an attempt to create an object of this abstract class, either in the code or through a transaction that tries to instantiate it.
  
  Solution:
  
  Check Class Definition: Review the class definition in the ABAP Workbench (SE80 or SE24) to confirm that it is indeed marked as abstract.
  Instantiate a Concrete Subclass: Instead of trying to instantiate the abstract class directly, you should create an instance of a concrete subclass that inherits from the abstract class. Ensure that the subclass implements all the abstract methods defined in the abstract class.
  Modify Code: If you have code that is trying to instantiate the abstract class, modify it to instantiate the appropriate subclass instead.
  
  Related Information:
  
  Abstract Classes: In ABAP, an abstract class can contain abstract methods that must be implemented by any concrete subclass. This is a way to enforce a contract for subclasses.
  Inheritance: Understand the inheritance hierarchy of the classes involved. The abstract class may have one or more subclasses that provide the necessary implementations.
  Documentation: Refer to the SAP documentation on object-oriented programming in ABAP for more details on how to work with abstract classes and inheritance.
  
  Example:
  If you have an abstract class ZCL_ABSTRACT and a concrete class ZCL_CONCRETE that extends it, you should instantiate ZCL_CONCRETE instead of ZCL_ABSTRACT:
  DATA(lo_instance) = NEW zcl_concrete( ).
  By following these steps, you should be able to resolve the OO122 error and properly utilize the abstract class in your SAP ABAP development.