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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message APPLG237 - GP: Method is not supported by the class selected ?

  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 the system not recognizing the method.
  
  Solution:
  
  Check Class Definition: Verify that the method you are trying to call is indeed defined in the class you are using. You can do this by checking the class definition in the ABAP Workbench (transaction SE80 or SE24).
  Method Visibility: Ensure that the method is public or accessible from the context where you are trying to call it. If it is private or protected, you may need to adjust your access or use a different method.
  Interface Implementation: If you are working with interfaces, ensure that the class implements the interface correctly and that the method is defined in the interface.
  Correct Typographical Errors: Double-check the method name and class name for any spelling mistakes or incorrect casing.
  Debugging: Use the debugger to step through the code and identify where the error occurs. This can help you understand the context in which the unsupported method is being called.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP, including class and method definitions.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and how they resolved them.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to the error message APPLG237.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution.