How To Fix APPLG237 - GP: Method is not supported by the class selected

APPLG237 - Overview

• Message type: E = Error

• Message class: APPLG - Application Graphics Messages (Graphic Proxy Framework)

• Message number: 237

• Message text: GP: Method is not supported by the class selected

What causes this issue?

The interface method is empty. The class implementing the interface
does not offer this method.

How to fix this error?

Check that you have selected an appropriate class. If the method has to
be used then you should select another class that also implements the
required interface.
If the message occurred with CL_GUI_GP then the implementation is
missing in the subclass.

Error message extract from SAP system. Copyright SAP SE.

APPLG237 - Details

• The SAP error message APPLG237 indicates that a method is being called that is not supported by the class you are trying to use. This typically occurs in the context of ABAP programming, particularly when working with object-oriented programming (OOP) in SAP.
  
  Cause:
  
  Incorrect Class Usage: The method you are trying to invoke may not be defined in the class you are using. This can happen if you are trying to call a method that belongs to a different class or if the method is not implemented in the subclass.
  Method Visibility: The method might be private or protected, meaning it cannot be accessed from the context in which you are trying to call it.
  Interface Implementation: If you are using interfaces, the class may not implement the required interface correctly, leading to the method not being available.
  Typographical Errors: There could be a typo in the method name or the class name, leading to