How To Fix /IWXBE/CORE018 - Class '&1' cannot be used; inheritence from class '&2' required

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 018

• Message text: Class '&1' cannot be used; inheritence from class '&2' required

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWXBE/CORE018 - Class '&1' cannot be used; inheritence from class '&2' required ?

  The SAP error message /IWXBE/CORE018 Class '&1' cannot be used; inheritance from class '&2' required typically occurs in the context of Business Object Processing Framework (BOPF) or when dealing with Business Object classes in SAP. This error indicates that the class you are trying to use (denoted as &1) does not meet the inheritance requirements from another class (denoted as &2).
  Cause:
  
  Inheritance Requirement: The class you are trying to use is expected to inherit from a specific parent class. If it does not, the system will throw this error.
  Configuration Issues: There may be a misconfiguration in the class definitions or the way they are set up in the system.
  Development Errors: If you are developing or modifying classes, you may have forgotten to set the correct inheritance.
  
  Solution:
  
  
  Check Class Definition: Verify the definition of the class &1 and ensure that it is correctly inheriting from class &2. You can do this by:
  
  Navigating to the class in the ABAP Workbench (transaction SE24).
  Checking the "Inheritance" tab to see if the correct parent class is specified.
  
  
  
  Modify Class: If the class does not inherit from the required class, you will need to modify it:
  
  Open the class in SE24.
  Change the superclass to the required class &2.
  Activate the class after making changes.
  
  
  
  Check for Dependencies: Ensure that all dependencies and related classes are correctly defined and activated.
  
  
  Consult Documentation: If you are unsure about the inheritance requirements, consult the SAP documentation or the development guidelines for the specific business object you are working with.
  
  
  Testing: After making the necessary changes, test the functionality again to ensure that the error is resolved.
  
  
  Related Information:
  
  Transaction Codes: Use SE24 for class definitions, SE80 for object navigation, and SE11 for data dictionary objects.
  SAP Notes: Check SAP Notes for any known issues or patches related to the specific classes you are working with.
  Debugging: If the error persists, consider using the debugger to trace where the error is being triggered in the code.
  
  By following these steps, you should be able to resolve the error and ensure that your class definitions are correctly set up in SAP.