How To Fix OZ139 - Subobject name & not in customer namespace

SAP Error Message - Details

• Message type: E = Error

• Message class: OZ - Customizing Basis tools

• Message number: 139

• Message text: Subobject name & not in customer namespace

What causes this issue?

You are trying to create a new subobject for an SAP maintenance and
transport object. The name you entered (&V1&) is not in the customer
name range, so you cannot be sure it will not be overwritten by system
maintenance.
The customer name range comprises all subobject names having a Y or Z
as the ninth character.

System Response

The subobject is created anyway.

How to fix this error?

Use a name in the customer name range.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OZ139 - Subobject name & not in customer namespace ?

  The SAP error message OZ139 indicates that a subobject name is not in the customer namespace. This typically occurs when you are trying to create or modify an object (like a table, function module, or class) in the SAP system, and the name you are using does not conform to the naming conventions for customer-defined objects.
  Cause:
  
  Namespace Violation: In SAP, objects are categorized into different namespaces. The customer namespace is usually defined by a specific prefix (like Z or Y). If you attempt to create an object with a name that does not start with these prefixes, you will encounter this error.
  Incorrect Naming: The name you are trying to use may be reserved for SAP standard objects or may not follow the naming conventions set by your organization.
  
  Solution:
  
  Use the Correct Namespace: Ensure that the name of the object you are trying to create or modify starts with the appropriate prefix (Z or Y) that indicates it is a custom object. For example, if you are creating a custom table, name it something like ZMY_TABLE.
  Check Naming Conventions: Review your organization’s naming conventions for custom objects to ensure compliance.
  Consult Documentation: If you are unsure about the naming conventions or the correct namespace, consult your SAP documentation or reach out to your SAP Basis or development team for guidance.
  Use Transaction SE80 or SE11: When creating objects, use the appropriate transactions (like SE80 for Object Navigator or SE11 for Data Dictionary) to ensure you are in the right namespace.
  
  Related Information:
  
  Namespaces in SAP: SAP uses namespaces to differentiate between standard SAP objects and customer-defined objects. The customer namespace is typically reserved for custom developments.
  Development Guidelines: It is a good practice to follow SAP’s development guidelines and naming conventions to avoid conflicts and ensure maintainability.
  Transport Requests: If you are working in a development environment, ensure that your changes are included in a transport request for proper migration to other environments (like QA or Production).
  
  If you continue to experience issues after following these steps, consider reaching out to your SAP support team for further assistance.