How To Fix RJ063 - Cannot create a public instance of class &1

SAP Error Message - Details

• Message type: E = Error

• Message class: RJ - BW Extractor Handling Message Class

• Message number: 063

• Message text: Cannot create a public instance of class &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RJ063 - Cannot create a public instance of class &1 ?

  The SAP error message RJ063, which states "Cannot create a public instance of class &1," typically occurs in the context of ABAP programming and object-oriented development within the SAP environment. This error indicates that the system is unable to instantiate a class because the class is defined as private or has restricted visibility.
  Cause:
  
  Visibility Restrictions: The class you are trying to instantiate is declared as PRIVATE or has restricted visibility. In ABAP, classes can have different visibility levels (PUBLIC, PROTECTED, PRIVATE), and if a class is not declared as PUBLIC, it cannot be instantiated outside of its own definition or context.
  Incorrect Class Name: The class name specified in the error message may be incorrect or misspelled.
  Missing Implementation: The class may not have been implemented correctly, or the necessary methods may not be defined.
  
  Solution:
  
  Check Class Declaration: Review the class definition in the ABAP Workbench (SE80 or SE24) to ensure that the class is declared as PUBLIC. If it is declared as PRIVATE, you will need to change its visibility to PUBLIC if appropriate.
  CLASS my_class DEFINITION
    PUBLIC
  ...
  ENDCLASS.
  
  Correct Instantiation: Ensure that you are instantiating the class correctly in your code. Use the correct syntax for creating an instance of the class.
  DATA(lo_instance) = NEW my_class( ).
  
  Check for Typos: Verify that the class name used in your code matches the class name defined in the system. Look for any typographical errors.
  Review Class Dependencies: If the class is dependent on other classes or interfaces, ensure that those dependencies are correctly defined and accessible.
  Consult Documentation: If the class is part of a standard SAP package or third-party library, consult the relevant documentation to understand its intended use and visibility.
  
  Related Information:
  
  ABAP Class Visibility: Understanding the visibility of classes in ABAP is crucial for object-oriented programming. Classes can be defined with different access levels, which control where and how they can be accessed.
  Debugging: Use the ABAP debugger to step through the code and identify where the instantiation is failing. This can provide additional context for the error.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  If the issue persists after checking these aspects, consider reaching out to your SAP support team or consulting with an experienced ABAP developer for further assistance.