How To Fix OO266 - Attribute &1 &2: Alias object type must be an interface (REFCLSNAME)

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 266

• Message text: Attribute &1 &2: Alias object type must be an interface (REFCLSNAME)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO266 - Attribute &1 &2: Alias object type must be an interface (REFCLSNAME) ?

  The SAP error message OO266 indicates that there is an issue with the definition of an alias object type in your ABAP code. Specifically, it states that the alias object type must be an interface, but it seems that it is not defined as such.
  Cause:
  The error occurs when you are trying to define an alias for a class or an object type that is not an interface. In ABAP Object-Oriented programming, an alias can only point to an interface type, and if it points to a class or another type that is not an interface, this error will be triggered.
  Solution:
  To resolve this error, you should:
  
  
  Check the Definition: Review the definition of the alias object type in your code. Ensure that the object type you are trying to alias is indeed an interface.
  
  
  Modify the Alias: If the object type is a class or another type, you will need to either:
  
  Change the definition of the object type to be an interface if that is appropriate for your design.
  Use a different object type that is an interface for your alias.
  
  
  
  Correct Syntax: Ensure that the syntax used for defining the alias is correct. The alias should be defined using the TYPE statement, and it should reference an interface.
  
  
  Example:
  If you have something like this in your code:
  TYPES: my_alias TYPE REF TO my_class.
  You should change it to:
  TYPES: my_alias TYPE REF TO my_interface.
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on object types and interfaces in ABAP.
  Debugging: Use the ABAP debugger to trace where the alias is being defined and used, which can help you identify the source of the error.
  Community Forums: If you are still having trouble, consider reaching out to SAP community forums or support for additional assistance.
  
  By ensuring that your alias is correctly defined as an interface, you should be able to resolve the OO266 error.