How To Fix SY604 - Class constructor of & not yet executed

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 604

• Message text: Class constructor of & not yet executed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY604 - Class constructor of & not yet executed ?

  The SAP error message SY604 indicates that the class constructor for a specified class has not yet been executed. This typically occurs when you attempt to access a method or property of a class instance before the constructor has been called, which is necessary to initialize the object properly.
  Cause:
  
  Class Not Instantiated: The class instance has not been created, or the constructor has not been executed.
  Static Methods: If you are trying to call a non-static method or access a non-static attribute from a static context without instantiating the class.
  Incorrect Sequence of Calls: The sequence of method calls may be incorrect, leading to the constructor not being executed before accessing the class methods or properties.
  
  Solution:
  
  Instantiate the Class: Ensure that you create an instance of the class before trying to access its methods or properties. For example:
  DATA: lo_instance TYPE REF TO your_class.
  CREATE OBJECT lo_instance.
  
  Check Constructor Logic: Verify that the constructor (CONSTRUCTOR) of the class is correctly defined and does not contain any logic that could prevent it from executing.
  Review Method Calls: Ensure that you are calling methods in the correct order. If a method relies on the constructor being executed first, make sure that the constructor is called before invoking that method.
  Debugging: Use debugging tools to step through the code and check if the constructor is being called as expected. Look for any conditions that might prevent the constructor from executing.
  
  Related Information:
  
  ABAP Class Structure: Understanding the structure of ABAP classes, including the constructor and method definitions, is crucial for troubleshooting this error.
  Documentation: Refer to the SAP documentation for more details on class instantiation and object-oriented programming in ABAP.
  SAP Community: You can also check forums and community discussions for similar issues and solutions shared by other developers.
  
  By following these steps, you should be able to resolve the SY604 error and ensure that your class instances are properly initialized before use.