How To Fix /IWXBE/CORE020 - Class '&1' cannot be used; runtime internal class

/IWXBE/CORE020 - Overview

• Message type: E = Error

• Message class: /IWXBE/CORE -

• Message number: 020

• Message text: Class '&1' cannot be used; runtime internal class

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWXBE/CORE020 - Class '&1' cannot be used; runtime internal class ?

  The SAP error message /IWXBE/CORE020 Class '&1' cannot be used; runtime internal class typically indicates that the system is trying to use a class that is classified as a "runtime internal class." This means that the class is not intended for direct use in the application or is restricted in some way.
  
  Cause:
  
  Internal Class Usage: The class you are trying to use is defined as an internal class by SAP, which means it is meant for internal processing and should not be instantiated or called directly in your code.
  Incorrect Configuration: There may be a configuration issue where the system is trying to access a class that is not meant to be accessed directly.
  Development Errors: If you are developing custom code, you might have mistakenly referenced an internal class instead of a public one.
  
  
  Solution:
  
  Check Class Definition: Review the class definition in the ABAP Workbench (SE80 or SE11) to confirm its status. If