How To Fix FDT_EXPRESSIONS669 - Mapped source &1 is not convertible to target &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 669

• Message text: Mapped source &1 is not convertible to target &2

What causes this issue?

The source data object &v1& is not convertible to the mapped target data
object &v2&.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Specify convertible parameters.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS669 - Mapped source &1 is not convertible to target &2 ?

  The SAP error message FDT_EXPRESSIONS669 indicates that there is a type mismatch between the source and target fields in a data transformation or mapping process. Specifically, it means that the mapped source field (denoted as &1) cannot be converted to the target field type (denoted as &2). This error typically occurs in scenarios involving data transformation, such as in SAP Data Services, SAP S/4HANA, or other SAP applications that involve data mapping.
  Causes:
  
  Data Type Mismatch: The source field may have a data type that is incompatible with the target field. For example, trying to map a string to a numeric field or a date to a string without proper conversion.
  Length Issues: The length of the source data may exceed the maximum length allowed for the target field.
  Null Values: If the source field contains null values and the target field does not allow nulls, this can lead to conversion issues.
  Invalid Data Format: The format of the data in the source field may not match the expected format of the target field (e.g., date formats).
  Custom Logic: If there is custom logic or expressions involved in the mapping, they may not be handling the data types correctly.
  
  Solutions:
  
  Check Data Types: Verify the data types of both the source and target fields. Ensure that they are compatible and that any necessary conversions are applied.
  Use Conversion Functions: If there is a type mismatch, use appropriate conversion functions (e.g., TO_STRING, TO_DATE, TO_NUMBER) to convert the source data to the target type.
  Adjust Field Lengths: Ensure that the length of the source data does not exceed the maximum length of the target field. If necessary, truncate or pad the data appropriately.
  Handle Null Values: Implement logic to handle null values in the source field, ensuring that they are either converted to a default value or allowed in the target field.
  Validate Data Formats: Ensure that the data in the source field is in the correct format expected by the target field. If necessary, reformat the data before mapping.
  Review Custom Logic: If custom expressions are used, review them to ensure they are correctly handling the data types and conversions.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for the specific module you are working with (e.g., SAP Data Services, SAP S/4HANA) for detailed information on data types and mapping.
  SAP Community: Engage with the SAP Community forums to seek advice from other users who may have encountered similar issues.
  Debugging Tools: Utilize debugging tools available in your SAP environment to trace the data flow and identify where the conversion issue occurs.
  
  By addressing the above points, you should be able to resolve the FDT_EXPRESSIONS669 error and ensure successful data mapping.