How To Fix UCFE038 - Only a key figure can be specified in a predefined structure

UCFE038 - Overview

• Message type: E = Error

• Message class: UCFE - Messages for Data Entry Layouts

• Message number: 038

• Message text: Only a key figure can be specified in a predefined structure

What causes this issue?

A range may not be defined for a characteristic in a data-driven
structure or a predefined fixed structure.

System Response

The data entry layout cannot be saved.

How to fix this error?

Define the characteristic as a single value.

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 UCFE038 - Only a key figure can be specified in a predefined structure ?

  The SAP error message UCFE038, which states "Only a key figure can be specified in a predefined structure," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when working with queries, data models, or InfoProviders. This error indicates that there is an issue with the structure of the data being processed, specifically that a non-key figure (like a characteristic or attribute) is being used in a context where only key figures are allowed.
  
  Cause:
  
  Incorrect Structure Definition: The predefined structure you are using is designed to accept only key figures, but you may have included characteristics or attributes that are not key figures.
  Query Design Issues: In the query designer, you might have inadvertently added a characteristic to a section of the query that is meant for key figures only.
  Data Model Configuration: The data model or InfoProvider may not be correctly configured to handle the data types being used.
  
  
  Solution:
  
  Review