How To Fix FDT_CORE839 - Action definition incomplete (no message defined)

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 839

• Message text: Action definition incomplete (no message defined)

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 FDT_CORE839 - Action definition incomplete (no message defined) ?

  The SAP error message FDT_CORE839: Action definition incomplete (no message defined) typically occurs in the context of SAP Fiori or SAP UI5 applications when there is an issue with the action definitions in the Fiori Elements or Smart Controls framework. This error indicates that an action has been defined, but there is no corresponding message defined for it, which is necessary for the action to be executed properly.
  Cause:
  
  Missing Message Definition: The action defined in the application does not have an associated message defined in the message catalog.
  Incorrect Action Configuration: The action might be incorrectly configured in the metadata or annotations, leading to the system not being able to find the necessary message.
  Transport Issues: If the application was transported from one system to another, the message definitions might not have been included in the transport request.
  Development Errors: Errors in the development of the application, such as missing or incorrect references to message classes or message IDs.
  
  Solution:
  
  
  Define the Missing Message:
  
  Check the action definition in the metadata or annotations and ensure that a message is defined for the action.
  If a message is missing, create a new message in the message catalog and link it to the action.
  
  
  
  Review Action Configuration:
  
  Verify the action configuration in the OData service or the annotations to ensure that it is correctly set up.
  Ensure that the action is properly defined in the service metadata and that it references the correct message.
  
  
  
  Check Transport Requests:
  
  If the application was transported, ensure that all necessary objects, including message definitions, were included in the transport request.
  If not, transport the missing message definitions from the development system to the target system.
  
  
  
  Debugging:
  
  Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and check for any errors in the response.
  Check the application logs (transaction SLG1) for any additional error messages that might provide more context.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for Fiori Elements and Smart Controls to ensure that you are following the best practices for defining actions and messages.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  Fiori Elements Documentation: Review the official SAP Fiori Elements documentation for guidelines on action definitions and message handling.
  
  By following these steps, you should be able to resolve the FDT_CORE839 error and ensure that your action definitions are complete and functional.