How To Fix IS018 - Partner function & has an invalid partner type

IS018 - Overview

• Message type: E = Error

• Message class: IS - Equipment management

• Message number: 018

• Message text: Partner function & has an invalid partner type

What causes this issue?

You have entered a partner function that has a partner type that is not
allowed. For customers, you can only enter partner functions of partner
type 'KU', for vendors, you can only enter partner functions of type
'VN'.

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 a valid partner function. Check the partner type if necessary.

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ENDIF

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IS018 - Partner function & has an invalid partner type ?

  The SAP error message IS018, which states "Partner function & has an invalid partner type," typically occurs in the context of partner determination in SAP, particularly when dealing with business partners, customers, or vendors. This error indicates that the system has encountered a partner function that is not correctly defined or is not associated with a valid partner type.
  
  Cause:
  
  Incorrect Partner Function Configuration: The partner function may not be correctly configured in the system. This could be due to missing or incorrect entries in the partner function settings.
  Invalid Partner Type: The partner type associated with the partner function may not be valid or may not exist in the system.
  Customizations or Enhancements: If there have been customizations or enhancements made to the partner determination process, they may have introduced inconsistencies.
  Data Inconsistencies: There may be inconsistencies in the master data related to the business partners, such as missing or incorrect partner type assignments.
  
  
  Solution:
  
  
  Check