How To Fix NGC_CORE_CLS004 - Class with internal class no. &1 does not exist or is not valid on &2

SAP Error Message - Details

• Message type: E = Error

• Message class: NGC_CORE_CLS - Message class for class maintenance

• Message number: 004

• Message text: Class with internal class no. &1 does not exist or is not valid on &2

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 NGC_CORE_CLS004 - Class with internal class no. &1 does not exist or is not valid on &2 ?

  The SAP error message NGC_CORE_CLS004 indicates that there is an issue with a class in the system. Specifically, it means that the internal class number specified does not exist or is not valid on the given date. This error typically arises in the context of SAP's Next Generation Computing (NGC) or similar frameworks where class definitions are crucial for the execution of certain processes.
  Cause:
  
  Non-existent Class: The class number referenced in the error message does not exist in the system. This could be due to a typo, a missing class, or a class that has not been properly activated.
  Invalid Class: The class may exist but is not valid for the context in which it is being called. This could happen if the class has been deactivated or if there are versioning issues.
  Configuration Issues: There may be configuration problems in the system that prevent the class from being recognized or accessed.
  Transport Issues: If the class was recently transported from another system, it may not have been transported correctly or completely.
  
  Solution:
  
  Check Class Existence: Verify that the class number exists in the system. You can do this by using transaction codes like SE80 (Object Navigator) or SE24 (Class Builder) to search for the class.
  Activate Class: If the class exists but is not active, activate it. This can be done in the Class Builder (SE24) by selecting the class and choosing the activation option.
  Review Configuration: Check the configuration settings related to the class and ensure that everything is set up correctly. This includes checking any dependencies that the class may have.
  Check Transport Logs: If the class was recently transported, review the transport logs to ensure that the transport was successful and that all necessary objects were included.
  Consult Documentation: Refer to SAP documentation or notes related to the specific class or functionality you are working with. There may be known issues or additional steps required for certain classes.
  Contact SAP Support: If the issue persists after checking the above points, consider reaching out to SAP support for further assistance. Provide them with the error message details and any relevant context.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE80 (Object Navigator), SE24 (Class Builder), and SE37 (Function Module) for debugging and checking class definitions.
  SAP Notes: Search for SAP Notes related to the specific class or error message. SAP Notes often contain solutions for known issues.
  Development Environment: Ensure that you are working in the correct development environment and that all necessary transports have been applied.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution.