How To Fix UCF2021 - &1 is not within the customer namespace

UCF2021 - Overview

• Message type: E = Error

• Message class: UCF2 - Messages for Currency Translation

• Message number: 021

• Message text: &1 is not within the customer namespace

What causes this issue?

A specific namespace is reserved for custom settings for currency
translation (translation key, translation timeframe, translation
procedure, exchange rate period used, and procedure for exchange rate
determination). The settings delivered by SAP start with a numeric digit
, whereas customer settings start with an alphabetic character (letter).
The value you selected (&V1&) is not in the customer namespace.

System Response

The setting &V1& cannot be created, changed, or deleted.

How to fix this error?

Either call up input help and select an existing setting, or create a
new value in the customer namespace.

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 UCF2021 - &1 is not within the customer namespace ?

  The SAP error message UCF2021 indicates that a certain object (like a function module, class, or other development object) is not within the customer namespace. In SAP, namespaces are used to differentiate between standard SAP objects and custom objects created by customers or partners. The customer namespace typically starts with a specific prefix (like "Z" or "Y") to indicate that it is a custom development.
  
  Cause:
  
  Object Naming: The object you are trying to access or use is likely part of the SAP standard namespace (which does not start with "Z" or "Y") and is not intended for modification or direct use in custom developments.
  Development Guidelines: SAP has strict guidelines regarding the use of namespaces to prevent conflicts between standard and custom objects.
  Transport Issues: If the object was transported from one system to another, it may not have been properly included in the customer namespace.
  
  
  Solution:
  
  Check Object Namespace: Verify the namespace of the