How To Fix KW391 - Parameter or function name &1 already exists.

KW391 - Overview

• Message type: E = Error

• Message class: KW - CO-ABC Activity-Based Costing

• Message number: 391

• Message text: Parameter or function name &1 already exists.

What causes this issue?

The external parameter name or function name &V1& already exists for
parameter or function &V4& in namespace &V2& of environment &V3&.
External parameter name and function name must be unique for the same
ABAP/4 parameter or logical function.

System Response

The name cannot be transferred.

How to fix this error?

Change the name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message KW391 - Parameter or function name &1 already exists. ?

  The SAP error message KW391, which states "Parameter or function name &1 already exists," typically occurs when you are trying to create a new parameter or function in the SAP system that has the same name as an existing one. This can happen in various contexts, such as when defining custom parameters in transaction codes or when working with function modules.
  
  Cause:
  
  Duplicate Name: The most common cause is that the name you are trying to use for a parameter or function is already in use by another parameter or function in the system.
  Namespace Conflicts: If you are working in a development environment, there may be conflicts with existing objects in the same namespace.
  Transport Issues: If you are transporting objects between systems, there may be a conflict with existing objects in the target system.
  
  
  Solution:
  
  
  Check Existing Parameters/Functions: Before creating a new parameter or function, check the existing ones to ensure that the name