How To Fix UCS0304 - User name &1 is invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 304

• Message text: User name &1 is invalid

What causes this issue?

The transferred user name does not exist.

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 user name.

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 UCS0304 - User name &1 is invalid ?

  The SAP error message UCS0304, which states "User name &1 is invalid," typically occurs when there is an issue with the user ID being used in the SAP system. Here are the potential causes, solutions, and related information for this error:
  Causes:
  
  Invalid User ID Format: The user ID may not conform to the naming conventions set by the SAP system (e.g., length, special characters).
  User Does Not Exist: The specified user ID may not exist in the SAP user master records.
  User Locked or Inactive: The user account may be locked or inactive, preventing login.
  Authorization Issues: The user may not have the necessary authorizations to perform the action they are attempting.
  System Configuration: There may be configuration issues in the system that affect user management.
  
  Solutions:
  
  Check User ID Format: Ensure that the user ID follows the correct format as per your organization's naming conventions. Typically, SAP user IDs should be alphanumeric and may have specific length restrictions.
  Verify User Existence: Use transaction code SU01 to check if the user ID exists in the system. If it does not exist, you may need to create a new user.
  Unlock or Activate User: If the user exists but is locked or inactive, you can unlock or activate the user account using transaction code SU01.
  Check Authorizations: Ensure that the user has the necessary authorizations to perform the required actions. You can check this in the user profile or by using transaction code SU53 to analyze authorization failures.
  Consult with Basis Team: If the issue persists, it may be necessary to consult with your SAP Basis team or system administrator to check for any underlying configuration issues or system errors.
  
  Related Information:
  
  Transaction Codes:
  
  SU01: User Maintenance
  SU53: Display Authorization Check
  SU10: Mass User Maintenance
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to user management and error messages.
  Documentation: Refer to SAP Help documentation for user management and authorization concepts.
  
  If you continue to experience issues after trying these solutions, it may be beneficial to reach out to your SAP support team for further assistance.