How To Fix IX018 - Partners with function & must not be changed

IX018 - Overview

• Message type: E = Error

• Message class: IX - Messages for Service Processing

• Message number: 018

• Message text: Partners with function & must not be changed

What causes this issue?

The partner function has been marked as unchangeable in Customizing.

System Response

The system will not allow you to change the partner.

How to fix this error?

INCLUDE NA_SYS OBJECT DOKU ID TX LANGUAGE E

Error message extract from SAP system. Copyright SAP SE.

IX018 - Details

• The SAP error message IX018 ("Partners with function & must not be changed") typically occurs in the context of partner functions in SAP, particularly when dealing with business partner (BP) data or customer/vendor master data. This error indicates that there is an attempt to change a partner function that is not allowed due to the system's configuration or business rules.
  
  Cause:
  
  Immutable Partner Functions: Certain partner functions are defined as immutable in the system. This means that once they are assigned to a business partner, they cannot be changed or removed.
  Configuration Settings: The configuration settings in the SAP system may restrict changes to specific partner functions based on business rules or organizational policies.
  Data Integrity: The system is designed to maintain data integrity, and changing certain partner functions could lead to inconsistencies in related documents or processes.
  
  
  Solution:
  
  Review Partner Functions: Check the partner functions assigned to the business partner in question. Ensure that you