How To Fix DT281 - Table name & is not in a valid namespace

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 281

• Message text: Table name & is not in a valid namespace

What causes this issue?

You used a table name which does not lie in a valid namespace.

System Response

Activation of the table is rejected.

How to fix this error?

Choose another table name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT281 - Table name & is not in a valid namespace ?

  The SAP error message DT281 indicates that a specified table name is not in a valid namespace. This typically occurs when you are trying to access or create a table that does not conform to the naming conventions or namespace rules defined in the SAP system.
  Cause:
  
  Invalid Namespace: In SAP, tables are organized into namespaces. Standard SAP tables are usually prefixed with "T" or "Z" for custom tables. If you try to create or access a table with an invalid prefix or outside the allowed namespace, you will encounter this error.
  Typographical Error: There may be a typo in the table name you are trying to access or create.
  Development Class Issues: If you are working in a development class that does not allow certain namespaces, this error can occur.
  Transport Layer Issues: If the table is being transported from one system to another and the namespace is not recognized in the target system, this error may arise.
  
  Solution:
  
  Check Table Name: Ensure that the table name you are trying to use follows the correct naming conventions. For custom tables, it should typically start with "Z" or "Y".
  Use Valid Namespace: If you are creating a new table, make sure you are using a valid namespace. You can check the namespaces in the SAP system by using transaction SE03 or SE80.
  Correct Typographical Errors: Double-check for any typos in the table name.
  Review Development Class: Ensure that the development class you are using allows for the creation of tables in the desired namespace.
  Consult Documentation: If you are unsure about the naming conventions or namespaces, refer to the SAP documentation or consult with your SAP Basis or development team.
  Transport Issues: If the issue arises during a transport, ensure that the transport request is correctly configured and that the target system recognizes the namespace.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to check the table definitions and namespaces.
  SAP Notes: Check SAP Notes for any known issues related to namespaces and table creation.
  Development Guidelines: Familiarize yourself with SAP's development guidelines regarding naming conventions and namespaces to avoid similar issues in the future.
  
  If the problem persists after checking these aspects, it may be beneficial to reach out to your SAP support team for further assistance.