How To Fix FDT_CORE404 - Structure contains structure type data

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 404

• Message text: Structure contains structure type data

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE404 - Structure contains structure type data ?

  The SAP error message FDT_CORE404 indicates that there is an issue with the structure definition in your SAP system. Specifically, it means that the structure you are trying to use contains a field that is of a structure type, which is not allowed in certain contexts, particularly when working with field-based data types in SAP Fiori or other UI technologies.
  Cause:
  The error typically arises in the following scenarios:
  
  Nested Structures: You are trying to use a structure that contains another structure as a field. This is not supported in certain contexts where flat data types are expected.
  Data Model Issues: The data model you are working with may not be properly defined, leading to the inclusion of complex types where simple types are required.
  Incompatible Data Types: The system expects a simple data type (like CHAR, NUMC, etc.) but encounters a structure type instead.
  
  Solution:
  To resolve the FDT_CORE404 error, you can take the following steps:
  
  
  Review the Structure Definition:
  
  Check the structure definition in the ABAP Dictionary (transaction SE11).
  Ensure that the structure does not contain any fields that are themselves structures. If it does, consider flattening the structure by replacing nested structures with simple fields.
  
  
  
  Modify the Data Model:
  
  If you are using a data model in a Fiori application or similar, ensure that the data model is designed to use simple types.
  If necessary, create a new flat structure that includes only the required fields from the nested structures.
  
  
  
  Adjust the UI Configuration:
  
  If you are working with UI5 or Fiori, ensure that the binding context is correctly set up to handle the data types being used.
  Check the XML or JSON model definitions to ensure they align with the expected data types.
  
  
  
  Testing:
  
  After making changes, test the application or report to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional context or solutions for this error.
  Documentation: Review SAP documentation related to data modeling and structure definitions to ensure compliance with best practices.
  Community Forums: Consider searching or posting on SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the FDT_CORE404 error and implement a suitable solution.