How To Fix FDT_CORE216 - Invalid name (&1); use namespace correctly "/.../..."

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_CORE - Formula & Derivation Tool: Core

• Message number: 216

• Message text: Invalid name (&1); use namespace correctly "/.../..."

What causes this issue?

You have tried to create an object with the name &v1&. However, the use
of the slash character ("/") in this name does not comply with the
naming conventions for BRFplus objects.
The slash character is only permitted as a part of an object's name to
separate the name of the object itself from a namespace prefix preceding
the object's name. If you want to use namespaces in an object name, the
following rules apply:
The first character of the name must be a slash (indicating that a
namespace is being used).
There must be at least one more slash as part of the name string
(indicating either the end of the namespace or of a particular level in
case of a multi-level namespace).
An empty string is not permitted as a namespace ("//").
The last slash in the object name must be followed by at least one more
character (indicating the name of the object itself, without the
namespace).

System Response

The object cannot be created.

How to fix this error?

Change the object name according to the rules outlined above.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_CORE216 - Invalid name (&1); use namespace correctly "/.../..." ?

  The SAP error message FDT_CORE216 indicates that there is an issue with the naming convention used in your SAP system, specifically related to the use of namespaces. This error typically arises when you are trying to create or reference an object (like a field, data element, or structure) that does not conform to the required naming standards.
  Cause:
  
  Invalid Namespace: The name you are trying to use does not follow the correct namespace format. In SAP, namespaces are used to avoid naming conflicts between different development objects. A valid namespace usually starts with a specific prefix (like /Z or /Y) followed by the object name.
  Incorrect Naming Convention: The name may contain invalid characters or may not adhere to the length restrictions imposed by SAP.
  Missing Namespace: If you are trying to create an object in a custom namespace but have not specified it correctly, this error can occur.
  
  Solution:
  
  Check Naming Convention: Ensure that the name you are using follows the correct naming conventions. For example, it should start with a valid namespace prefix and should not contain any special characters that are not allowed.
  Use Correct Namespace: If you are working in a custom namespace, make sure to include it in the name. For example, if your namespace is /Z, your object name should look like /Z_OBJECT_NAME.
  Review Object Properties: If you are modifying an existing object, check its properties to ensure that the namespace is correctly defined.
  Consult Documentation: Refer to SAP documentation or guidelines regarding naming conventions and namespaces to ensure compliance.
  Use Transaction Codes: You can use transaction codes like SE80 (Object Navigator) or SE11 (Data Dictionary) to check the existing objects and their namespaces.
  
  Related Information:
  
  Namespaces in SAP: Namespaces are a way to organize and manage custom developments in SAP. They help prevent naming conflicts and ensure that custom objects do not interfere with standard SAP objects.
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or solutions for this error.
  Development Guidelines: Familiarize yourself with SAP's development guidelines, which include best practices for naming conventions and object management.
  
  If you continue to experience issues after following these steps, consider reaching out to your SAP Basis or development team for further assistance.