How To Fix FDT_CORE799 - Message class &1 does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 799

• Message text: Message class &1 does not exist

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 FDT_CORE799 - Message class &1 does not exist ?

  The SAP error message FDT_CORE799 with the description "Message class &1 does not exist" typically indicates that the system is trying to reference a message class that has not been defined or is not available in the system. This can occur in various scenarios, such as when using custom developments, forms, or applications that rely on specific message classes.
  Cause:
  
  Missing Message Class: The specified message class (indicated by &1) has not been created or is not available in the SAP system.
  Typographical Error: There may be a typo in the message class name being referenced.
  Transport Issues: If the message class was part of a transport request, it may not have been imported correctly into the target system.
  Authorization Issues: The user may not have the necessary authorizations to access the message class.
  
  Solution:
  
  
  Check Message Class:
  
  Go to transaction SE91 (Message Class Maintenance) and check if the message class exists.
  If it does not exist, you may need to create it or ensure that it is included in the relevant transport request.
  
  
  
  Correct Typographical Errors:
  
  Verify the spelling of the message class in the code or configuration where it is being referenced.
  
  
  
  Transport Request:
  
  If the message class is part of a transport request, ensure that the transport has been successfully imported into the target system.
  Check the transport logs for any errors during the import process.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to access the message class. This can be checked with the help of your SAP security team.
  
  
  
  Debugging:
  
  If you have access to debugging tools, you can set breakpoints in the code to see where the message class is being called and gather more context about the error.
  
  
  
  Related Information:
  
  Message Classes: In SAP, message classes are used to group messages for easier management and localization. Each message class can contain multiple messages, which can be used in various applications.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional context.
  Documentation: Review the documentation for any custom developments or third-party applications that may be using the message class.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis or development team for further assistance.