How To Fix FDT_EXPRESSIONS056 - Possible data conversion conflict; mapping of &1 to &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 056

• Message text: Possible data conversion conflict; mapping of &1 to &2

What causes this issue?

The parameter &v1& may not be convertible to the mapped parameter &v2&.
This depends on the value that is assigned at run-time.
<DS:TX.FDT_CONVERTIBILITY>FDT Data Object Convertibility</>

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_EXPRESSIONS056 - Possible data conversion conflict; mapping of &1 to &2 ?

  The SAP error message FDT_EXPRESSIONS056 indicates that there is a possible data conversion conflict when mapping data from one field to another. This typically occurs in the context of data transformation or mapping processes, such as when using SAP Data Services or SAP S/4HANA.
  Cause:
  The error arises when there is an attempt to convert data from one type to another, and the conversion is not valid. This can happen due to several reasons, including:
  
  Data Type Mismatch: The source and target fields have incompatible data types (e.g., trying to map a string to a numeric field).
  Value Range Issues: The value in the source field may not be within the acceptable range for the target field (e.g., trying to map a large number to a field that only accepts smaller values).
  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 or Empty Values: If the source field contains null or empty values, and the target field does not allow nulls, this can also trigger the error.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Data Types: Verify that the data types of the source and target fields are compatible. If they are not, consider changing the data type of one of the fields or using a conversion function to ensure compatibility.
  
  
  Validate Data Values: Ensure that the values in the source field are valid for the target field. If necessary, implement data validation or cleansing steps to handle invalid values before mapping.
  
  
  Adjust Mapping Logic: If the mapping logic is complex, review it to ensure that it correctly handles all possible scenarios, including null or empty values.
  
  
  Use Conversion Functions: If applicable, use conversion functions (e.g., TO_DATE, TO_NUMBER, etc.) to explicitly convert data types during the mapping process.
  
  
  Test with Sample Data: Run tests with sample data to identify specific cases that trigger the error, and adjust your mapping logic accordingly.
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on data mapping and transformation functions.
  SAP Community: Engage with the SAP Community forums to find discussions related to similar errors and solutions shared by other users.
  Debugging Tools: Utilize SAP debugging tools to trace the data flow and identify where the conversion conflict occurs.
  
  By following these steps, you should be able to identify the root cause of the FDT_EXPRESSIONS056 error and implement a suitable solution.