How To Fix FDT_EXPRESSIONS852 - Mapping parameter position &1: Possible data loss, field length differs

FDT_EXPRESSIONS852 - Overview

• Message type: E = Error

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

• Message number: 852

• Message text: Mapping parameter position &1: Possible data loss, field length differs

What causes this issue?

For the current procedure call expression, the system has determined
that the procedure parameter and the associated BRFplus data object
(mapping position #&V1&) have different field lengths. At runtime, this
may lead to the following potentially critical situations:
The parameter is of type importing / changing / tables and the length of
the BRFplus object is greater than the length of the parameter.
The parameter is of type returning / exporting / changing / tables and
the length of the BRFplus object is smaller than the length of the
parameter.
In both cases, it may happen that a value passed to a data object or
parameter cannot be stored properly in the object or parameter. In such
a case, the value will be truncated so that it fits into the available
field length.

System Response

You can still activate the object, but unexpected system behavior might
occur at runtime.

How to fix this error?

Adjust the length either of the parameter or of the BRFplus 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_EXPRESSIONS852 - Mapping parameter position &1: Possible data loss, field length differs ?

  The SAP error message FDT_EXPRESSIONS852 indicates that there is a potential data loss issue due to a mismatch in field lengths between the source and target mappings in a data transformation process. This typically occurs in the context of SAP Data Services or SAP Process Integration (PI) when mapping data fields from one structure to another.
  
  Cause:
  The error arises when:
  
  The length of the source field is greater than the length of the target field.
  The mapping is attempting to assign a value from a source field to a target field that cannot accommodate the full value due to its defined length.
  This can happen in various scenarios, such as when using expressions, transformations, or during data migration processes.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Field Lengths: 
  
  Review the definitions of both the source and target fields in the mapping. Ensure that the target field has a sufficient length to accommodate