How To Fix UAC010 - Class "&1": Method "&2" should be implemented by subclass

SAP Error Message - Details

• Message type: E = Error

• Message class: UAC -

• Message number: 010

• Message text: Class "&1": Method "&2" should be implemented by subclass

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message UAC010 - Class "&1": Method "&2" should be implemented by subclass ?

  The SAP error message UAC010 indicates that a method defined in a class is expected to be implemented by a subclass, but it has not been implemented. This typically occurs in the context of ABAP Object-Oriented programming when dealing with abstract classes or interfaces.
  Cause:
  
  Abstract Class or Interface: The class in question is likely an abstract class or an interface that defines certain methods that must be implemented by any subclass.
  Missing Implementation: The subclass that is supposed to implement the method has not provided an implementation for the specified method.
  Incorrect Class Usage: The subclass may not be correctly inheriting from the abstract class or interface.
  
  Solution:
  
  
  Implement the Method: Go to the subclass that is supposed to implement the method and provide the necessary implementation for the method specified in the error message.
  
  You can do this by navigating to the subclass in the ABAP Workbench (SE80 or SE24) and adding the method implementation.
  
  
  
  Check Inheritance: Ensure that the subclass is correctly inheriting from the abstract class or interface. You can check this in the class definition.
  
  
  Review Method Signature: Make sure that the method signature in the subclass matches the one defined in the abstract class or interface. This includes the method name, parameters, and return type.
  
  
  Activate the Class: After implementing the method, make sure to activate the class to ensure that the changes take effect.
  
  
  Related Information:
  
  Abstract Classes: In ABAP, an abstract class can contain abstract methods that do not have an implementation. Any subclass must implement these methods.
  Interfaces: Similar to abstract classes, interfaces define methods that must be implemented by any class that implements the interface.
  Debugging: If you are unsure where the issue lies, you can use the ABAP debugger to trace the execution and see where the error is being raised.
  
  Example:
  If you have an abstract class ZCL_ANIMAL with an abstract method SPEAK, any subclass like ZCL_DOG must implement the SPEAK method:
  CLASS ZCL_ANIMAL DEFINITION ABSTRACT.
    PUBLIC SECTION.
      METHODS SPEAK ABSTRACT.
  ENDCLASS.
  
  CLASS ZCL_DOG DEFINITION INHERITING FROM ZCL_ANIMAL.
    PUBLIC SECTION.
      METHODS SPEAK REDEFINITION.
  ENDCLASS.
  
  CLASS ZCL_DOG IMPLEMENTATION.
    METHOD SPEAK.
      WRITE 'Woof!'.
    ENDMETHOD.
  ENDCLASS.
  If ZCL_DOG does not implement SPEAK, you will encounter the UAC010 error. Implementing the method as shown will resolve the issue.