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

SAP Error Message - Details

• 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

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 it is marked as a runtime internal class, you should not use it directly.
  Use Public Classes: Look for alternative public classes that provide the functionality you need. SAP provides many public APIs and classes that are intended for use in custom development.
  Review Code: If you are developing custom code, ensure that you are not referencing internal classes. Refactor your code to use the appropriate public classes or methods.
  Consult Documentation: Check SAP documentation or the SAP Community for guidance on the specific class you are trying to use. There may be recommended practices or alternative classes available.
  Contact SAP Support: If you believe this error is occurring due to a bug or unexpected behavior in the system, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes that might address this specific error or provide additional context.
  ABAP Development Guidelines: Familiarize yourself with SAP's guidelines for ABAP development to avoid using internal classes in the future.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  
  By following these steps, you should be able to resolve the error and avoid similar issues in the future.