How To Fix IUID051 - UII &1 contains invalid characters

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 051

• Message text: UII &1 contains invalid characters

What causes this issue?

The UII &V1& contains invalid characters. There are only the following
characters allowed for building a UII: A - Z, 0 - 9, /, -

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 UII.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message IUID051 - UII &1 contains invalid characters ?

  The SAP error message IUID051 indicates that the Unique Item Identifier (UII) you are trying to use contains invalid characters. This error typically arises when the UII does not conform to the expected format or character set defined by the system.
  Cause:
  The error can be caused by several factors:
  
  Invalid Characters: The UII may contain characters that are not allowed, such as special characters, spaces, or punctuation marks.
  Length Restrictions: The UII may exceed the maximum length allowed by the system.
  Format Issues: The UII may not follow the required format, which could include specific patterns or structures.
  
  Solution:
  To resolve the IUID051 error, you can take the following steps:
  
  
  Check the UII Format: Ensure that the UII adheres to the required format. This may include:
  
  Only using alphanumeric characters (A-Z, 0-9).
  Avoiding special characters (e.g., @, #, $, %, etc.).
  Ensuring there are no leading or trailing spaces.
  
  
  
  Validate Length: Confirm that the UII does not exceed the maximum length specified by your SAP configuration. Typically, UIIs have a defined length limit.
  
  
  Use Correct Encoding: If the UII is being generated or imported from an external system, ensure that it is encoded correctly and does not contain any hidden characters.
  
  
  Consult Documentation: Refer to SAP documentation or your organization's guidelines for the specific requirements for UIIs in your context.
  
  
  Test with Valid Data: Try entering a known valid UII to see if the error persists. This can help determine if the issue is with the specific UII you are using or a broader system issue.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting SAP Notes for any known issues related to this error.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any updates or patches related to the IUID051 error.
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in managing UIIs, such as IUID for managing unique item identifiers.
  User Exits and Enhancements: If your organization has custom enhancements, ensure that they are not interfering with the UII validation process.
  
  By following these steps, you should be able to identify and correct the issue causing the IUID051 error in SAP.