How To Fix OL662 - Method 'ExistenceCheck' is not redefined

SAP Error Message - Details

• Message type: E = Error

• Message class: OL - Workflow object types: Run-time system

• Message number: 662

• Message text: Method 'ExistenceCheck' is not redefined

What causes this issue?

The method 'ExistenceCheck' is executed automatically in the
instantiation. To avoid problems during instantiation, you should
ensure that this method is implemented correctly.
In this case, the method is inherited and not redefined. This suggests
that the method has only the default implementation from the interface
IFSAP. The existence check is not yet implemented.

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?

Please check whether the method 'ExistenceCheck' carries out a correct
existence check on the current object.
If this is not the case, please implement the method.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OL662 - Method 'ExistenceCheck' is not redefined ?

  The SAP error message OL662, which states "Method 'ExistenceCheck' is not redefined," typically occurs in the context of ABAP programming, particularly when dealing with class methods in Object-Oriented ABAP. This error indicates that the method ExistenceCheck is expected to be redefined in a subclass but has not been implemented.
  Cause:
  
  Inheritance Issue: The method ExistenceCheck is defined in a superclass (or interface) but has not been overridden in the subclass where it is being called.
  Abstract Method: If ExistenceCheck is an abstract method in the superclass, it must be implemented in any concrete subclass.
  Interface Implementation: If the class implements an interface that includes the ExistenceCheck method, it must provide an implementation for that method.
  
  Solution:
  
  
  Redefine the Method: Go to the subclass where the error occurs and implement the ExistenceCheck method. Ensure that the method signature matches that of the superclass or interface.
  METHOD if_your_interface~ExistenceCheck.
    " Your implementation here
  ENDMETHOD.
  
  
  Check Class Hierarchy: Review the class hierarchy to ensure that the method is correctly defined in the superclass and that the subclass is correctly inheriting from it.
  
  
  Implementing Abstract Methods: If the method is abstract, make sure to provide a concrete implementation in the subclass.
  
  
  Check for Typos: Ensure that there are no typographical errors in the method name or signature.
  
  
  Activate Changes: After implementing the method, make sure to activate the class to reflect the changes.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for Object-Oriented ABAP to understand how method overriding and inheritance work.
  Debugging: Use the ABAP debugger to trace where the method is being called and verify the class hierarchy.
  SAP Community: Engage with the SAP Community forums for additional insights and similar issues faced by other developers.
  
  By following these steps, you should be able to resolve the OL662 error and ensure that the ExistenceCheck method is properly defined and implemented in your ABAP classes.