How To Fix OO803 - Class &1 cannot be instantiated directly

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 803

• Message text: Class &1 cannot be instantiated directly

What causes this issue?

The class is marked as private or protected. This means that only the
class itself or its friends and subclasses may instantiate the class.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Call a static method of the class that returns an instance.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO803 - Class &1 cannot be instantiated directly ?

  The SAP error message OO803, which states "Class &1 cannot be instantiated directly," typically occurs when you attempt to create an instance of an abstract class or an interface in ABAP (Advanced Business Application Programming). Here’s a breakdown of the cause, solution, and related information for this error:
  Cause:
  
  Abstract Class: The class you are trying to instantiate is defined as an abstract class. Abstract classes cannot be instantiated directly; they are meant to be subclassed.
  Interface: If you are trying to instantiate an interface, this will also lead to the same error, as interfaces cannot be instantiated directly.
  Incorrect Class Type: You may be using the wrong class type in your code, leading to an attempt to instantiate a class that is not meant to be instantiated.
  
  Solution:
  
  
  Check Class Definition: Review the class definition of the class you are trying to instantiate. If it is abstract, you need to create a subclass that implements the abstract methods and instantiate that subclass instead.
  
  
  Example:
  CLASS my_subclass DEFINITION INHERITING FROM my_abstract_class.
  ENDCLASS.
  
  DATA(lo_instance) = NEW my_subclass( ).
  
  
  
  
  Use a Concrete Class: If you are working with an interface, ensure that you are instantiating a concrete class that implements the interface.
  
  
  Example:
  INTERFACE if_example.
    METHODS method_example.
  ENDINTERFACE.
  
  CLASS cl_example DEFINITION IMPLEMENTING if_example.
    METHOD if_example~method_example.
      " Implementation
    ENDMETHOD.
  ENDCLASS.
  
  DATA(lo_instance) = NEW cl_example( ).
  
  
  
  
  Review Code Logic: Ensure that your logic correctly identifies when to instantiate classes and that you are not mistakenly trying to instantiate an abstract class or interface.
  
  
  Related Information:
  
  Abstract Classes: These are classes that cannot be instantiated and are used to define a common interface for subclasses. They may contain abstract methods that must be implemented by subclasses.
  Interfaces: These define a contract for classes that implement them but do not provide any implementation themselves.
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP, including how to work with classes and interfaces.
  
  By following these guidelines, you should be able to resolve the OO803 error and correctly implement your object-oriented logic in ABAP.