How To Fix OO077 - Alias methods have no implementation

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 077

• Message text: Alias methods have no implementation

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO077 - Alias methods have no implementation ?

  The SAP error message OO077, which states "Alias methods have no implementation," typically occurs in the context of ABAP Object-Oriented programming. This error indicates that an alias method has been defined in a class or interface, but it does not have an associated implementation.
  Cause:
  
  Alias Method Definition: An alias method is a method that is defined in a class or interface as a reference to another method. It does not have its own implementation but points to an existing method.
  Missing Implementation: The error arises when the alias method is declared but not properly linked to an existing method, or the method it points to does not exist or is not accessible.
  
  Solution:
  To resolve the OO077 error, you can follow these steps:
  
  
  Check Method Declaration: Verify that the alias method is correctly declared in the class or interface. Ensure that it points to a valid method that exists in the class or in a superclass.
  
  
  Implement the Method: If the method that the alias points to does not exist, you need to implement it. This can be done by creating the method in the appropriate class.
  
  
  Correct Access Modifiers: Ensure that the method being aliased is accessible from the context where the alias is being used. If the method is private or protected, it may not be accessible.
  
  
  Check for Typos: Look for any typographical errors in the method name or signature that could prevent the alias from correctly referencing the intended method.
  
  
  Recompile the Class: After making changes, recompile the class or interface to ensure that the changes take effect.
  
  
  Related Information:
  
  Alias Method Syntax: The syntax for defining an alias method typically looks like this:
  METHOD alias_method FOR METHOD original_method.
  
  Documentation: Refer to the SAP documentation on ABAP Object-Oriented programming for more details on methods, alias methods, and their usage.
  Debugging: Use the ABAP debugger to step through the code and identify where the alias method is being called and what it is pointing to.
  
  By following these steps, you should be able to resolve the OO077 error and ensure that your alias methods are correctly implemented in your ABAP code.