How To Fix OO153 - Invalid declaration type. Use 'Method' or 'Class Method'

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 153

• Message text: Invalid declaration type. Use 'Method' or 'Class Method'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO153 - Invalid declaration type. Use 'Method' or 'Class Method' ?

  The SAP error message OO153, which states "Invalid declaration type. Use 'Method' or 'Class Method'?", typically occurs in ABAP Object-Oriented programming when there is an issue with the declaration of a method in a class or interface. This error indicates that the method declaration is not correctly specified according to the expected syntax.
  
  Cause:
  
  Incorrect Method Declaration: The method may be declared incorrectly in the class or interface. For example, using an invalid keyword or syntax that does not conform to the ABAP OO standards.
  Missing Keywords: The keywords METHOD or CLASS METHOD may be missing in the method declaration.
  Scope Issues: The method might be declared in a context where it is not allowed, such as outside of a class or interface definition.
  
  
  Solution:
  To resolve the OO153 error, you should:
  
  
  Check Method Declaration: Ensure that the method is declared correctly. The correct syntax for a method declaration in a class is as follows:
  CLASS class_name DEFINITION.