How To Fix FL048 - Class references are not allowed in TABLES parameters

SAP Error Message - Details

• Message type: E = Error

• Message class: FL - Function Builder messages

• Message number: 048

• Message text: Class references are not allowed in TABLES parameters

What causes this issue?

You tried to define a reference to a class as a table parameter.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

In the Dictionary, create a table of row type 'Reference to class'. You
can use it as reference type for the paraemters of function modules and
methods.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FL048 - Class references are not allowed in TABLES parameters ?

  The SAP error message FL048: Class references are not allowed in TABLES parameters typically occurs when you are trying to use a class reference in a TABLES parameter of a function module or method. In ABAP, TABLES parameters are designed to work with internal tables, and class references (which are object-oriented constructs) are not compatible with this type of parameter.
  Cause:
  The error arises when:
  
  You attempt to pass a reference to a class or an object as a TABLES parameter.
  The TABLES parameter is expected to be an internal table, but a class reference is provided instead.
  
  Solution:
  To resolve this error, you should ensure that you are passing the correct type of data to the TABLES parameter. Here are some steps you can take:
  
  
  Check the Function Module/Method Signature: Review the definition of the function module or method you are calling. Ensure that the parameters you are passing match the expected types.
  
  
  Use Internal Tables: If you need to pass data to a TABLES parameter, make sure you are using an internal table. For example:
  DATA: lt_data TYPE TABLE OF your_structure.
  
  
  Avoid Class References: If you have a class reference that you need to work with, consider extracting the necessary data from the class instance and populating an internal table with that data before passing it to the TABLES parameter.
  
  
  Refactor Code: If the design requires using class references, consider refactoring your code to avoid using TABLES parameters. You might use other parameter types like IMPORTING or EXPORTING parameters, or even return values.
  
  
  Related Information:
  
  ABAP Programming Model: Understanding the difference between procedural and object-oriented programming in ABAP can help you avoid such issues. Familiarize yourself with how to work with internal tables and class instances.
  SAP Documentation: Refer to the official SAP documentation for more details on function modules, methods, and parameter types.
  Debugging: Use the ABAP debugger to step through your code and inspect the types of variables being passed to the function/module to identify where the mismatch occurs.
  
  By following these guidelines, you should be able to resolve the FL048 error and ensure that your ABAP code functions correctly.