How To Fix FDT_CORE028 - Invalid expression type &2 for object &1, actual expression type is &3

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 028

• Message text: Invalid expression type &2 for object &1, actual expression type is &3

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE028 - Invalid expression type &2 for object &1, actual expression type is &3 ?

  The SAP error message FDT_CORE028 indicates that there is a mismatch in the expected expression type for a specific object in the context of SAP's Flexible Data Import (FDI) or Flexible Data Transfer (FDT) framework. This error typically arises when the system encounters an expression that does not conform to the expected type for the given object.
  Cause:
  
  Type Mismatch: The error occurs when the expression type defined for an object does not match the actual expression type being used. For example, if an object is expected to be a string but an integer is provided, this error will be triggered.
  Incorrect Configuration: The configuration of the data transfer or transformation might be incorrect, leading to the use of an inappropriate expression type.
  Data Type Changes: If there have been changes in the underlying data model or data types, existing expressions may no longer be valid.
  
  Solution:
  
  Check Expression Types: Review the expression types defined for the object in question. Ensure that the expression you are using matches the expected type.
  Modify Expressions: If you find that the expression type is incorrect, modify the expression to match the expected type. This may involve changing data types or using appropriate conversion functions.
  Review Configuration: Go through the configuration settings for the FDT or FDI to ensure that all objects and their corresponding expressions are correctly defined.
  Debugging: If the issue persists, consider using debugging tools to trace the execution and identify where the type mismatch is occurring.
  Consult Documentation: Refer to SAP documentation or help resources for guidance on the specific object and expression types involved.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Community Forums: Engage with SAP community forums or support channels where similar issues may have been discussed.
  Version Compatibility: Ensure that you are using compatible versions of SAP components, as discrepancies can sometimes lead to such errors.
  
  By following these steps, you should be able to identify and resolve the cause of the FDT_CORE028 error in your SAP environment.