How To Fix RJ064 - Constructor of class &1 has mandatory parameters

SAP Error Message - Details

• Message type: E = Error

• Message class: RJ - BW Extractor Handling Message Class

• Message number: 064

• Message text: Constructor of class &1 has mandatory parameters

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RJ064 - Constructor of class &1 has mandatory parameters ?

  The SAP error message RJ064 indicates that there is an issue with the constructor of a class in ABAP (Advanced Business Application Programming). Specifically, it means that the constructor of the specified class (&1) has mandatory parameters that are not being provided when an instance of the class is being created.
  Cause:
  The error occurs when:
  
  You are trying to instantiate a class that has a constructor defined with mandatory parameters.
  The code that is attempting to create an instance of this class does not supply the required parameters.
  
  Solution:
  To resolve this error, you need to ensure that when you create an instance of the class, you provide all the mandatory parameters required by the constructor. Here are the steps to fix the issue:
  
  
  Check the Class Definition: Look at the class definition to identify the constructor and its parameters. You can do this by navigating to the class in the ABAP Workbench (SE80 or SE24).
  
  
  Review the Constructor: Examine the constructor method to see which parameters are marked as mandatory. Mandatory parameters are typically defined without a default value.
  
  
  Modify the Instantiation Code: Update the code where you are instantiating the class to include all the required parameters. For example:
  DATA(lo_instance) = NEW your_class_name( param1 = value1 param2 = value2 ).
  Ensure that you replace param1, param2, value1, and value2 with the actual parameter names and values required by the constructor.
  
  
  Test the Changes: After making the necessary changes, test the code to ensure that the error is resolved and that the class instance is created successfully.
  
  
  Related Information:
  
  ABAP Class and Object-Oriented Programming: Understanding how classes and objects work in ABAP is crucial. Familiarize yourself with concepts like constructors, destructors, and method definitions.
  Debugging: If you are unsure about the parameters required, you can use the ABAP debugger to step through the code and inspect the class definition at runtime.
  Documentation: Refer to SAP documentation or the ABAP programming guidelines for best practices in class design and instantiation.
  
  By following these steps, you should be able to resolve the RJ064 error and successfully instantiate the class with the required parameters.