How To Fix FDT_CORE820 - Message text does not have a first message variable

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 820

• Message text: Message text does not have a first message variable

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_CORE820 - Message text does not have a first message variable ?

  The SAP error message FDT_CORE820 indicates that there is an issue with the message text in the context of the SAP Fiori Design Time (FDT) framework. Specifically, the error states that the message text does not have a first message variable, which means that the system is expecting a variable in the message text that is not present.
  Cause:
  
  Missing Message Variable: The message text defined in the system is expected to contain a variable (like a placeholder) that is not defined or is missing.
  Incorrect Configuration: There may be a misconfiguration in the message definition or the way the message is being called in the application.
  Custom Development Issues: If there are custom developments or enhancements, they might not be correctly handling message variables.
  
  Solution:
  
  
  Check Message Definition:
  
  Go to transaction SE91 (Message Class) and check the message class associated with the error.
  Ensure that the message text includes the necessary variables. If it is supposed to have a variable, make sure it is defined correctly.
  
  
  
  Update Message Text:
  
  If the message text is missing a variable, update it to include the required variable. For example, if the message is supposed to include a user name, it should be defined as "User &1 has logged in" where &1 is the variable.
  
  
  
  Review Custom Code:
  
  If the error arises from custom code, review the code to ensure that it is correctly passing the required variables when calling the message.
  Ensure that the message is being called with the correct parameters.
  
  
  
  Testing:
  
  After making changes, test the application to ensure that the error no longer occurs and that the messages are displayed correctly.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or community forums for additional insights or similar issues encountered by other users.
  
  
  
  Related Information:
  
  Message Classes: In SAP, messages are organized into message classes. Each message class can contain multiple messages, and each message can have variables that are dynamically replaced at runtime.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context or fixes.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the FDT_CORE820 error and implement a solution to resolve it.