How To Fix IUID018 - UII is set to external creation; internal creation of UIIs not possible

SAP Error Message - Details

• Message type: E = Error

• Message class: IUID - Messages Class for Unique Item Identification

• Message number: 018

• Message text: UII is set to external creation; internal creation of UIIs not possible

What causes this issue?

In the master data, you have specified that UIIs for material &V1& in
plant &V2& are to be created externally.

System Response

Internal UII creation is therefore not possible.

How to fix this error?

Create UII externally or change your master data to specify that UIIs
are created internally using transaction <LS>Change Material</> (MM02).

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 IUID018 - UII is set to external creation; internal creation of UIIs not possible ?

  The SAP error message IUID018 indicates that the Unique Item Identifier (UII) is set to be created externally, which means that the system is not allowed to create UIIs internally. This typically occurs in the context of managing Unique Item Identifiers (UIIs) for serialized items, particularly in industries that require strict tracking of items, such as defense or aerospace.
  Cause:
  The error arises when:
  
  The configuration for the material or item in question is set to require external creation of UIIs.
  The system is attempting to create a UII internally, which is not permitted under the current settings.
  
  Solution:
  To resolve this error, you can consider the following steps:
  
  
  Check Material Master Settings:
  
  Go to the material master record for the item in question.
  Check the settings related to UII under the relevant views (e.g., Basic Data, Plant Data, etc.).
  Ensure that the UII creation settings align with your business process requirements.
  
  
  
  Adjust UII Creation Settings:
  
  If internal creation of UIIs is required, you may need to change the configuration settings to allow for internal creation.
  This can typically be done in the configuration settings of the SAP system (transaction SPRO) under the relevant module (e.g., Logistics, Material Management).
  
  
  
  Review Configuration for UII:
  
  Check the configuration for UII management in the system. This may involve reviewing the settings in the customizing transaction (SPRO) under the relevant sections for UII management.
  Ensure that the settings for external vs. internal UII creation are correctly configured based on your business needs.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to UII management for additional insights and best practices.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the settings, consider reaching out to SAP support for further assistance. They can provide guidance based on the specific configuration and version of your SAP system.
  
  
  
  Related Information:
  
  UII Management: Understanding how UIIs are managed in your SAP system is crucial. This includes knowing when to use external vs. internal creation and the implications of each.
  Material Management: Familiarity with the material management processes in SAP can help in troubleshooting related issues.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to allow for the appropriate creation of UIIs in your SAP system.