How To Fix OO255 - Attribute &1 &2: Typing category not suitable for object reference

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 255

• Message text: Attribute &1 &2: Typing category not suitable for object reference

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO255 - Attribute &1 &2: Typing category not suitable for object reference ?

  The SAP error message OO255, which states "Attribute &1 &2: Typing category not suitable for object reference," typically occurs in the context of ABAP Object-Oriented programming. This error indicates that there is a mismatch between the expected data type of an attribute and the actual data type being used.
  Cause:
  The error is usually caused by one of the following issues:
  
  Incorrect Data Type: The attribute is defined with a data type that is not compatible with the object reference being assigned to it. For example, if an attribute is defined as a value type (like a primitive data type) but is being assigned an object reference.
  Inheritance Issues: If the attribute is defined in a superclass and the subclass is trying to use it incorrectly, this can lead to typing issues.
  Interface Implementation: If an attribute is expected to implement an interface but does not, this can also trigger the error.
  
  Solution:
  To resolve the OO255 error, you can take the following steps:
  
  
  Check Attribute Definition: Review the definition of the attribute in the class. Ensure that the data type of the attribute is compatible with the object reference you are trying to assign to it.
  
  
  Correct Data Types: If the attribute is defined as a value type, change it to an object reference type if it is supposed to hold an object. For example, if you have:
  DATA: my_attribute TYPE my_class.
  Change it to:
  DATA: my_attribute TYPE REF TO my_class.
  
  
  Review Inheritance: If the attribute is inherited from a superclass, ensure that the subclass is correctly implementing or overriding the attribute.
  
  
  Check Interface Implementation: If the class is implementing an interface, ensure that all attributes and methods conform to the interface's definitions.
  
  
  Recompile the Class: After making changes, recompile the class to ensure that all changes are applied.
  
  
  Related Information:
  
  ABAP Documentation: Refer to the official SAP documentation for more details on object-oriented programming in ABAP.
  Debugging: Use the ABAP debugger to step through the code and identify where the type mismatch occurs.
  SAP Community: Engage with the SAP Community forums for additional insights and solutions from other developers who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the OO255 error in your SAP ABAP code.