How To Fix TK203 - Object &1 &2 is in reserved namespace for package &3

SAP Error Message - Details

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 203

• Message text: Object &1 &2 is in reserved namespace for package &3

What causes this issue?

Object name &V1& &V2& belongs to a name range protected in table TRESN.
It can only be used in package &V3&.

System Response

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

How to fix this error?

Enter &V3& as the package.
If object &V1& &V2& is not in this package, choose a different object
name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TK203 - Object &1 &2 is in reserved namespace for package &3 ?

  The SAP error message TK203 indicates that an object (like a function module, class, or other development object) is in a reserved namespace for a specific package. This typically occurs when you are trying to create or modify an object in a namespace that is reserved for SAP or other specific purposes, which is not allowed for custom development.
  Cause:
  
  Reserved Namespace: The object you are trying to create or modify is in a namespace that is reserved for SAP or other specific applications. SAP has certain namespaces (like /SAP/, /ABAP/, etc.) that are not available for customer use.
  Package Restrictions: The package you are working with may have restrictions on the types of objects that can be created or modified within it.
  
  Solution:
  
  Check Namespace: Verify the namespace of the object you are trying to create or modify. Ensure that it is not in a reserved namespace.
  Use Custom Namespace: If you are developing custom objects, use a custom namespace (usually starting with a prefix like Z or Y) that is designated for customer development.
  Change Package: If the package you are using is restricted, consider changing to a different package that allows the creation of the object you need.
  Consult Documentation: Review SAP documentation or consult with your SAP Basis or development team to understand the restrictions associated with the package and namespace you are working with.
  
  Related Information:
  
  Namespaces: In SAP, namespaces are used to organize and manage development objects. Reserved namespaces are typically used by SAP or third-party vendors.
  Packages: Packages in SAP are used to group related development objects. Each package has its own set of rules and restrictions regarding what can be created or modified.
  Development Guidelines: Always follow SAP's development guidelines to avoid conflicts and ensure compliance with best practices.
  
  If you continue to face issues, consider reaching out to your SAP support team or consulting the SAP community for further assistance.