How To Fix OO037 - Chose either 'Instance event' or 'Class event'

OO037 - Overview

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 037

• Message text: Chose either 'Instance event' or 'Class event'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message OO037 - Chose either 'Instance event' or 'Class event' ?

  The SAP error message OO037, which states "Choose either 'Instance event' or 'Class event'," typically occurs in the context of Object-Oriented Programming in ABAP, particularly when working with events in classes and interfaces.
  
  Cause:
  This error arises when you are trying to define an event in a class or interface but have not specified whether it is an instance event or a class event. In ABAP, events can be categorized into two types:
  
  Instance Events: These are events that are triggered for a specific instance of a class. They are defined using the EVENTS keyword in the class definition.
  Class Events: These are events that are triggered at the class level, not tied to a specific instance. They are defined using the CLASS EVENTS keyword.
  
  If you attempt to define an event without clearly indicating which type it is, the system will raise the OO037 error.
  
  Solution:
  To resolve this error, you need to explicitly specify whether