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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message UMC001 - Objects that begin with a number belong to the SAP namespace ?

  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 Conventions: Use a naming convention that is consistent with your organization's standards. For example, you might use a prefix that identifies the object type or the module it belongs to.
  Avoid Special Characters: Stick to alphanumeric characters and avoid special characters or spaces in the object name.
  
  Related Information:
  
  SAP Namespaces: SAP uses different namespaces to differentiate between standard SAP objects and custom objects. Custom objects typically use a namespace that starts with a specific prefix assigned to your organization (e.g., Z or Y).
  Development Guidelines: Familiarize yourself with SAP's development guidelines and best practices to avoid similar issues in the future.
  Transaction Codes: You can use transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary) to manage and create objects while adhering to naming conventions.
  
  By following these guidelines, you should be able to avoid the UMC001 error and successfully create or modify your SAP objects.