How To Fix FDT_EXPRESSIONS853 - Mapping parameter position &1: Possible data loss text/nontext conversion

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 853

• Message text: Mapping parameter position &1: Possible data loss text/nontext conversion

What causes this issue?

For the current procedure call expression, the system has determined
that for the procedure parameter and the associated BRFplus data object
(mapping position #&v1&), the set of allowed characters is not
identical. This would be the case, for example, if one of the fields is
of type text (all characters allowed) while the other one is used for
presenting hexadecimal values (only characters '0'..'9', 'A'..'F'
allowed). At runtime, this may lead to the following potentially
critical situations:
You are trying to map a BRFplus data object of type text to an importing
/ changing / tables parameter of a type with a restricted character set.
You are trying to map an exporting / returning / changing / tables
parameter to a BRFplus data object of a type with a restricted character
set, e.g. mapping from a hexadecimal number to a data object of type
number.

System Response

The system will convert the data according to the conversion rules of
the ABAP language. See the ABAP keyword documentation chapter
'Conversion Rules' and its subchapters.

How to fix this error?

Make sure that at runtime, only valid data is stored in the data object.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS853 - Mapping parameter position &1: Possible data loss text/nontext conversion ?

  The SAP error message FDT_EXPRESSIONS853 typically occurs in the context of data mapping and transformation processes, particularly when using the SAP Data Services or SAP Process Integration (PI) tools. This error indicates that there is a potential data loss due to a mismatch in the expected data types during a mapping operation. Specifically, it refers to a situation where a mapping parameter is being converted from one data type to another (e.g., from text to non-text or vice versa), and this conversion could lead to loss of information.
  Cause:
  
  Data Type Mismatch: The source and target fields have incompatible data types. For example, trying to map a numeric field to a text field without proper conversion.
  Length Issues: The length of the source data exceeds the length of the target field, leading to truncation.
  Conversion Logic: The mapping logic may not handle certain values correctly, especially if there are special characters or formats involved.
  Null Values: If the source field can contain null values and the target field cannot, this can also trigger the error.
  
  Solution:
  
  Check Data Types: Review the data types of the source and target fields in the mapping. Ensure that they are compatible and that any necessary conversions are explicitly defined.
  Adjust Field Lengths: Ensure that the target field has sufficient length to accommodate the data being mapped from the source. If necessary, increase the length of the target field.
  Implement Conversion Logic: If there are specific conversion requirements (e.g., converting numeric to text), implement the appropriate conversion functions in the mapping.
  Handle Null Values: Ensure that the mapping logic accounts for null values appropriately. You may need to use default values or conditional logic to handle these cases.
  Test Mapping: After making adjustments, test the mapping with various data inputs to ensure that the error does not occur and that data integrity is maintained.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Data Services or Process Integration for detailed information on data mapping and transformation.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have implemented.
  Debugging Tools: Utilize debugging tools available in SAP to trace the mapping process and identify where the data type mismatch occurs.
  
  By addressing the underlying causes of the error and implementing the suggested solutions, you should be able to resolve the FDT_EXPRESSIONS853 error and ensure successful data mapping.