How To Fix W_CB107 - Casting error. Application object does not refer to class &1

SAP Error Message - Details

• Message type: E = Error

• Message class: W_CB -

• Message number: 107

• Message text: Casting error. Application object does not refer to class &1

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• What is the cause and solution for SAP error message W_CB107 - Casting error. Application object does not refer to class &1 ?

  SAP Error Message:
  
  W_CB107 Casting error. Application object does not refer to class &1
  
  Cause:
  This error occurs when there is an attempt to cast or convert an application object reference to a class type that it does not actually belong to or inherit from. In ABAP Object-Oriented programming, casting is used to treat an object reference as a reference to a more specific class. If the actual object instance is not compatible with the target class, the runtime raises this casting error.
  For example, if you have:
  DATA: ref_obj TYPE REF TO super_class,
        ref_sub TYPE REF TO sub_class.
  
  ref_obj = ref_sub.
  ref_sub = CAST sub_class( ref_obj ). " This will fail if ref_obj is not actually a sub_class instance
  If ref_obj does not point to an instance of sub_class or a subclass thereof, the cast fails with this error.
  
  Solution:
  
  
  Check the actual runtime type of the object before casting:
  Use the IS INSTANCE OF operator to verify the object's type before casting:
  IF ref_obj IS INSTANCE OF sub_class.
    ref_sub = CAST sub_class( ref_obj ).
  ELSE.
    " Handle the error or alternative logic
  ENDIF.
  
  
  Ensure correct object assignment:
  Make sure that the object reference you are trying to cast actually points to an instance of the target class or its subclass.
  
  
  Review the program logic:
  Trace back where the object reference is assigned and verify that the object creation or assignment is consistent with the expected class hierarchy.
  
  
  Debugging:
  Use the debugger to check the runtime type of the object reference before the cast. You can inspect the object reference's dynamic type using the debugger or by calling cl_abap_typedescr=>describe_by_data( ref_obj ).
  
  
  
  Related Information:
  
  ABAP Object-Oriented Programming: Casting is a common operation when dealing with polymorphism and inheritance.
  CAST operator: Introduced in newer ABAP versions to replace older CASTING statements.
  IS INSTANCE OF operator: Used to check the dynamic type of an object reference.
  SAP Notes: Sometimes, specific SAP standard programs or function modules may raise this error due to incorrect data or custom enhancements.
  
  
  Summary:
  
  Cause: Attempt to cast an object reference to a class it does not belong to.
  Solution: Check the object's type before casting using IS INSTANCE OF and ensure the object reference is correctly assigned.
  Additional: Use debugging and type inspection to identify the root cause.
  
  
  If you provide the specific code snippet or context where this error occurs, I can help you with a more tailored solution.