How To Fix AC688 - Base method &1 is not defined

SAP Error Message - Details

• Message type: E = Error

• Message class: AC - Error messages from Asset Customizing

• Message number: 688

• Message text: Base method &1 is not defined

What causes this issue?

Base method &V1& is not defined.

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?

Define base method &V1& in FI-AA Customizing under
<DS:TRAN.AFAMR>Maintain Base Methods</>.

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 AC688 - Base method &1 is not defined ?

  The SAP error message AC688, which states "Base method &1 is not defined," typically occurs in the context of ABAP programming, particularly when dealing with class-based programming and inheritance. This error indicates that the system is trying to call a method that is expected to be defined in a base class, but it cannot find it.
  Causes:
  
  Missing Method Definition: The method that is being called is not defined in the base class or any of its superclasses.
  Typographical Error: There may be a typo in the method name when it is being called.
  Incorrect Class Hierarchy: The class from which the method is being called may not be correctly inheriting from the base class that contains the method.
  Visibility Issues: The method may be defined but is not accessible due to visibility restrictions (e.g., it is declared as private in the base class).
  Changes in Class Definition: If the base class was modified (e.g., the method was removed or renamed), it could lead to this error.
  
  Solutions:
  
  Check Method Definition: Verify that the method is indeed defined in the base class. You can do this by navigating to the class definition in the ABAP Workbench (SE80 or SE24).
  Correct Typographical Errors: Ensure that the method name is spelled correctly in the calling code.
  Review Class Hierarchy: Check the inheritance structure to ensure that the class is correctly inheriting from the intended base class.
  Adjust Visibility: If the method is defined but not accessible, consider changing its visibility (e.g., from private to protected or public) if appropriate.
  Update Code: If the base class has been changed, update the calling code to reflect the new method name or structure.
  Check for Interface Implementation: If the method is part of an interface, ensure that the class implementing the interface has defined the method.
  
  Related Information:
  
  ABAP Class and Method Documentation: Familiarize yourself with the ABAP Object-Oriented Programming concepts, especially regarding class definitions, inheritance, and method visibility.
  Debugging: Use the ABAP debugger to trace the execution and identify where the error occurs.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific version of SAP you are using.
  Community Forums: Engage with SAP community forums or developer networks for additional insights or similar experiences from other developers.
  
  By following these steps, you should be able to identify the cause of the AC688 error and implement a suitable solution.