How To Fix UD028 - & contains a non-alphanumeric character

SAP Error Message - Details

• Message type: E = Error

• Message class: UD - EDM - Enterprise Data Model

• Message number: 028

• Message text: & contains a non-alphanumeric character

What causes this issue?

The object name contains a character not allowed by the SAP naming
conventions. Allowed characters are letters, numbers, underscore and
'/' for indicating name range prefixes. Figures and underscore cannot
be used in the first position of the name.

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?

Correct your entry.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UD028 - & contains a non-alphanumeric character ?

  The SAP error message UD028 typically indicates that a certain field contains a non-alphanumeric character, which is not allowed in the context of the operation you are trying to perform. This error often arises in various SAP modules when data input does not conform to the expected format.
  Cause:
  
  Non-Alphanumeric Characters: The most common cause of this error is the presence of special characters (e.g., symbols like @, #, $, %, &, etc.) in fields that are expected to contain only letters and numbers.
  Field Restrictions: Certain fields in SAP have specific restrictions on the type of characters that can be entered. For example, fields for usernames, material numbers, or certain codes may only accept alphanumeric characters.
  Data Import/Upload Issues: If you are importing data from an external source (like a CSV file), non-alphanumeric characters may inadvertently be included in the data.
  
  Solution:
  
  Check Input Data: Review the data you are entering or importing. Ensure that all fields comply with the alphanumeric requirement. Remove any special characters from the input.
  Validation: Implement validation checks in your data entry forms or import processes to catch non-alphanumeric characters before submission.
  Use SAP Standard Tools: If you are using custom programs or transactions, ensure they adhere to SAP standards for data entry. You may need to modify the code to include checks for valid characters.
  Error Handling: If you are developing custom applications, include error handling that provides clear feedback to users about which fields contain invalid characters.
  
  Related Information:
  
  SAP Documentation: Refer to the SAP Help Portal or specific module documentation for guidelines on valid character sets for different fields.
  Transaction Codes: If you are working with specific transactions, check the transaction codes related to the error for additional context.
  User Exits and BAdIs: If you are customizing SAP, consider using user exits or Business Add-Ins (BAdIs) to enforce character restrictions programmatically.
  Testing: After making changes, conduct thorough testing to ensure that the error does not recur and that the system behaves as expected.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting the SAP community for further assistance.