How To Fix FDT_EXPRESSIONS668 - Mapped source &1 might not be convertible to target &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 668

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

What causes this issue?

The source data object &v1& may not be convertible to the mapped target
data object &v2&. This depends on the value that is assigned at
run-time.

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?

If you are sure that the values used at run-time will always be
convertible, you do not have to react at all. If not you might want to
change the type of one of the data objects or use a different data
object in order to ensure convertibility during run-time.

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_EXPRESSIONS668 - Mapped source &1 might not be convertible to target &2 ?

  The SAP error message FDT_EXPRESSIONS668 indicates that there is an issue with the mapping of data types between a source and a target in a data transformation or mapping scenario. Specifically, it suggests that the mapped source field (source &1) cannot be converted to the target field (target &2) due to incompatible data types or formats.
  Cause:
  
  Data Type Mismatch: The source field may have a data type that is not compatible with the target field. For example, trying to map a string to a numeric field without proper conversion.
  Length Issues: The length of the source data may exceed the maximum length allowed for the target field.
  Format Issues: The format of the data in the source field may not match the expected format of the target field (e.g., date formats).
  Null Values: If the source field contains null values and the target field does not allow nulls, this can also trigger the error.
  
  Solution:
  
  Check Data Types: Review the data types of both the source and target fields. Ensure that they are compatible. If necessary, use conversion functions to transform the data type appropriately.
  Adjust Lengths: If the source data exceeds the target field's length, consider truncating the data or increasing the target field's length if possible.
  Format Conversion: If the data format is an issue (e.g., date formats), apply the necessary formatting functions to convert the source data into the expected format for the target.
  Handle Null Values: Ensure that the source field does not contain null values if the target field does not accept them. You may need to implement logic to handle or replace null values.
  Testing: After making adjustments, test the mapping again to ensure that the error is resolved.
  
  Related Information:
  
  SAP Documentation: Refer to the SAP Help Portal for detailed documentation on data mapping and transformation functions.
  Data Transformation Tools: If you are using SAP Data Services or similar tools, check their specific documentation for handling data type conversions and mappings.
  Debugging: Use debugging tools available in your SAP environment to trace the data flow and identify where the conversion issue occurs.
  
  By addressing the specific cause of the error, you should be able to resolve the issue and successfully map the source to the target.