How To Fix CL556 - Class type & is only used internally

CL556 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 556

• Message text: Class type & is only used internally

What causes this issue?

You have entered a class type that is only used internally.
You cannot create a class with this class type.

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?

Use the <PF>Change class type</> pushbutton to display a list of all
the class types you can use per object type, and select the class type
you require. Internal class types are not included in this list.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL556 - Class type & is only used internally ?

  The SAP error message CL556 indicates that the class type you are trying to use is designated for internal use only. This typically occurs when you attempt to create or manipulate a class of a type that is not intended for external use or is restricted to specific internal processes within SAP.
  
  Cause:
  
  Class Type Restriction: The class type you are trying to work with is defined in the SAP system as an internal class type. This means it is not meant to be instantiated or used in the same way as other class types (like public or abstract classes).
  Incorrect Class Type: You may be using the wrong class type for your intended purpose. For example, trying to create an instance of a class that is meant for internal SAP processes rather than for user-defined or application-specific purposes.
  
  
  Solution:
  
  Check Class Type: Verify the class type you are trying to use. You can do