How To Fix FS_APEL016 - Expression &1 does not supply an elementary field

FS_APEL016 - Overview

• Message type: E = Error

• Message class: FS_APEL - Notification for Processing of APEL Path

• Message number: 016

• Message text: Expression &1 does not supply an elementary field

Self-Explanatory Message

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FS_APEL016 - Details

• The SAP error message FS_APEL016 indicates that there is an issue with an expression in your SAP system that does not return an elementary field. This typically occurs in the context of financial accounting or controlling, particularly when working with data elements or fields in a report or a program.
  
  Cause:
  The error can arise due to several reasons:
  
  Incorrect Expression: The expression used in the report or program is not correctly defined or does not reference a valid elementary field.
  Field Type Mismatch: The expression may be trying to use a non-elementary field (like a structure or table) where an elementary field (like a single data type) is expected.
  Data Source Issues: The data source from which the expression is derived may not be correctly set up or may not contain the expected fields.
  Custom Code Issues: If there is custom ABAP code involved, it may not be correctly handling the data types or structures.
  
  
  Solution:
  To