How To Fix UMC001 - Objects that begin with a number belong to the SAP namespace

UMC001 - Overview

• Message type: E = Error

• Message class: UMC - General Messages

• Message number: 001

• Message text: Objects that begin with a number belong to the SAP namespace

What causes this issue?

You have entered a name for an object and the name begins with a
figure. However, names beginning with figures are delivered by SAP and
should not be used for objects created by users. Otherwise, the SAP and
customer namespaces cannot be maintained separately.

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

System Response

How to fix this error?

Choose an object name that begins with a letter.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

UMC001 - Details

• The SAP error message UMC001 indicates that you are trying to create or use an object (such as a program, function module, or class) that begins with a number. In SAP, objects that start with a number are reserved for the SAP namespace, which means they cannot be created or modified by users.
  
  Cause:
  The primary cause of this error is the naming convention in SAP. SAP reserves certain naming conventions for its own objects, and any object name that begins with a number is not allowed for custom development. This is a safeguard to prevent naming conflicts between SAP standard objects and custom objects created by users.
  
  Solution:
  To resolve this error, you should rename the object you are trying to create or use. Here are some guidelines for naming your objects:
  
  Start with a Letter: Ensure that the name of your object starts with a letter (A-Z, a-z) rather than a number.
  Follow Naming