How To Fix OO_SOURCE_BASED033 - A method implementation cannot uniquely be determined

SAP Error Message - Details

• Message type: E = Error

• Message class: OO_SOURCE_BASED - WB - Class Builder - Messages for the source-b. Class Editor

• Message number: 033

• Message text: A method implementation cannot uniquely be determined

What causes this issue?

The class can't be separated into its different source parts (public-,
protected-, (package-,) private section or method implementation).

System Response

A warning will be sent and the changes won't be stored.

How to fix this error?

Please check whether the source contains the following statements:
<EX>CLASS <class_name> DEFINITION.</>
<EX>...</>
<EX>ENDCLASS.</>

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

<EX>CLASS <class_name> IMPLEMENTATION.</>
<EX> METHOD <method_name_1>.</>
<EX> ...</>
<EX> ENDMETHOD.</>
<EX> ...</>
<EX> METHOD <method_name_n>.</>
<EX> ...</>
<EX> ENDMETHOD.</>
<EX>ENDCLASS.</>
<EX>It is also important to check that the public-, protected-,
(package-) and private section are in the correct order.</>
<EX>The syntax check will help you to determine where the class
structure is insufficient.</>

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 OO_SOURCE_BASED033 - A method implementation cannot uniquely be determined ?

  The SAP error message OO_SOURCE_BASED033 ("A method implementation cannot uniquely be determined") typically occurs in the context of Object-Oriented ABAP programming. This error indicates that the system is unable to determine which method implementation to call due to ambiguity, often arising from inheritance or interface implementation scenarios.
  Causes:
  
  Ambiguous Method Resolution: This error often occurs when a class inherits from multiple superclasses or implements multiple interfaces that define methods with the same name and signature. The system cannot determine which method to execute.
  Missing Method Implementation: If a subclass does not implement a method that is defined in an interface or superclass, and there are multiple potential candidates, the system may raise this error.
  Dynamic Method Calls: If you are using dynamic method calls (e.g., using CALL METHOD), and the method cannot be resolved to a single implementation, this error can occur.
  
  Solutions:
  
  Check Inheritance and Interfaces: Review the class hierarchy and interfaces to identify any ambiguities. Ensure that the method names and signatures are unique across the classes and interfaces involved.
  Implement Missing Methods: If a subclass is expected to implement a method from an interface or superclass, ensure that the method is properly implemented in the subclass.
  Use Explicit Method Calls: Instead of relying on dynamic method calls, use explicit method calls where possible. This can help the system resolve the method unambiguously.
  Refactor Code: If the ambiguity arises from multiple inheritance, consider refactoring the code to avoid such situations. This might involve renaming methods or restructuring the class hierarchy.
  Check for Overriding: Ensure that if a method is overridden in a subclass, it is done correctly and that the method signature matches the one in the superclass or interface.
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for Object-Oriented ABAP to understand the principles of inheritance, interfaces, and method resolution.
  Debugging: Use the ABAP debugger to trace the method calls and identify where the ambiguity arises.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other developers who may have encountered similar issues.
  
  By addressing the ambiguity in method resolution, you should be able to resolve the OO_SOURCE_BASED033 error effectively.