How To Fix 00768 - No user exists with SNC name "&"

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 768

• Message text: No user exists with SNC name "&"

What causes this issue?

A dialog logon occurred using Secure Network Communication (SNC). The
system could not find an R/3 user in the table USRACL for the user name
passed from the external security system to the R/3 System.

System Response

Logon is refused.

How to fix this error?

Use user maintenance (SU01) to assign the SNC to a user as an external
name.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 00768 - No user exists with SNC name "&" ?

  The SAP error message "00768 No user exists with SNC name '&'" typically indicates that the system is unable to find a user in the SAP system that corresponds to the specified Secure Network Communications (SNC) name. This error often arises in environments where SNC is used for secure communication between SAP systems and clients.
  Cause:
  
  Missing User: The user with the specified SNC name does not exist in the SAP system.
  Incorrect SNC Name: The SNC name provided may be incorrect or misspelled.
  SNC Configuration Issues: There may be issues with the SNC configuration in the SAP system or the client.
  User Not Assigned: The user may not have been assigned the correct SNC name in their user profile.
  
  Solution:
  
  
  Verify User Existence:
  
  Check if the user exists in the SAP system by using transaction code SU01 (User Maintenance).
  Enter the user ID and check if the user is active and properly configured.
  
  
  
  Check SNC Name:
  
  Ensure that the SNC name is correctly specified. The SNC name typically follows the format SNC:<SNC_NAME>.
  Compare the SNC name in the error message with the SNC name configured for the user in the SAP system.
  
  
  
  Assign SNC Name:
  
  If the user does not have an SNC name assigned, you can assign one in the user profile:
  
  Go to transaction SU01.
  Enter the user ID and click on the "Change" button.
  Navigate to the "Logon Data" tab and enter the appropriate SNC name in the "SNC Name" field.
  Save the changes.
  
  
  
  
  
  Check SNC Configuration:
  
  Ensure that the SNC is properly configured in both the SAP system and the client. This includes checking the SNC library and parameters in the instance profile.
  Verify that the SNC parameters are correctly set in the RZ10 transaction.
  
  
  
  User Authorization:
  
  Ensure that the user has the necessary authorizations to log in using SNC. This may involve checking roles and profiles assigned to the user.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to SNC configuration for additional troubleshooting steps.
  
  
  
  Related Information:
  
  SNC Overview: Secure Network Communications (SNC) is a security protocol that provides encryption and authentication for SAP communications.
  SAP Notes: Check SAP Notes for any known issues or patches related to SNC and user authentication.
  Transaction Codes:
  
  SU01: User Maintenance
  RZ10: Profile Parameter Maintenance
  SNC1: SNC Configuration
  
  
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or SAP support for further assistance.