How To Fix SNC005 - Unable to determine the canonical SNC name

SAP Error Message - Details

• Message type: E = Error

• Message class: SNC - Secure Network Communication, SNC

• Message number: 005

• Message text: Unable to determine the canonical SNC name

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SNC005 - Unable to determine the canonical SNC name ?

  The SAP error message SNC005: Unable to determine the canonical SNC name typically occurs in the context of Secure Network Communications (SNC) when the system is unable to resolve the SNC name for a user or system. This can happen due to various reasons related to configuration or network issues.
  Causes:
  
  Incorrect SNC Configuration: The SNC parameters in the SAP system may not be set correctly. This includes the SNC name, SNC library, or other related parameters.
  Missing or Incorrect User Mapping: The user may not be properly mapped to an SNC name in the SAP system or the underlying directory service (like Active Directory).
  SNC Library Issues: The required SNC library may not be installed or properly configured on the SAP application server.
  Network Issues: There may be network connectivity issues preventing the SAP system from reaching the directory service or the SNC provider.
  Certificate Issues: If using SNC with certificates, there may be issues with the certificates themselves, such as expiration or misconfiguration.
  
  Solutions:
  
  
  Check SNC Configuration:
  
  Verify the SNC parameters in the SAP profile (e.g., snc/enable, snc/identity/as, snc/identity/client, etc.).
  Ensure that the SNC name is correctly defined and matches the expected format.
  
  
  
  User Mapping:
  
  Ensure that the user is correctly mapped to an SNC name in the SAP system.
  Check the user’s settings in transaction SU01 and ensure that the SNC name is correctly assigned.
  
  
  
  SNC Library:
  
  Ensure that the required SNC library is installed and properly configured on the SAP application server.
  Check the snc/library parameter in the SAP profile to ensure it points to the correct library.
  
  
  
  Network Connectivity:
  
  Test network connectivity to the directory service or the SNC provider.
  Ensure that firewalls or network policies are not blocking the necessary ports.
  
  
  
  Certificate Validation:
  
  If using certificates, check that they are valid and not expired.
  Ensure that the certificate chain is complete and trusted by the SAP system.
  
  
  
  SAP Notes and Documentation:
  
  Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Review the official SAP documentation for SNC configuration to ensure all steps have been followed correctly.
  
  
  
  Related Information:
  
  SNC Documentation: Refer to the SAP Help Portal for detailed documentation on configuring SNC.
  SAP Notes: Search for specific SAP Notes related to SNC005 for any patches or updates that may resolve the issue.
  Transaction Codes: Use transaction codes like SNC1 to check SNC settings and SU01 for user management.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.