How To Fix SY558 - Virtual host is not configured: &1, port &2, no SNC

SAP Error Message - Details

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 558

• Message text: Virtual host is not configured: &1, port &2, no SNC

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY558 - Virtual host is not configured: &1, port &2, no SNC ?

  The SAP error message SY558 indicates that there is an issue with the configuration of the virtual host in the SAP system. Specifically, it states that the virtual host is not configured for the specified port and that there is no Secure Network Communications (SNC) setup.
  Cause:
  
  Virtual Host Configuration: The virtual host specified in the error message is not properly configured in the SAP system. This could be due to missing entries in the instance profile or incorrect settings in the SAP kernel.
  Port Configuration: The port mentioned in the error message may not be correctly assigned to the virtual host or may not be open for communication.
  SNC Configuration: The error also indicates that there is no SNC configured, which is necessary for secure communication in certain environments.
  
  Solution:
  
  
  Check Instance Profile:
  
  Go to the instance profile of the SAP system (usually found in the SAP profile directory).
  Ensure that the virtual host and port are correctly defined. Look for parameters like icm/HTTP/port_0 or icm/HTTPS/port_0 and verify that they are set correctly.
  
  
  
  Configure Virtual Host:
  
  If the virtual host is not configured, you may need to add it. This can be done in the SAP profile or through transaction RZ10 (for profile parameters).
  Ensure that the virtual host is correctly mapped to the IP address and that the DNS resolution is working properly.
  
  
  
  Check Network Configuration:
  
  Ensure that the network settings allow communication on the specified port. Check firewall settings and ensure that the port is open.
  Use tools like telnet or ping to verify connectivity to the specified port.
  
  
  
  SNC Configuration:
  
  If SNC is required, ensure that it is properly configured. This includes setting up the SNC parameters in the instance profile, such as snc/enable and snc/identity/as (for the SNC name).
  Make sure that the SNC library is installed and configured correctly.
  
  
  
  Restart the SAP Instance:
  
  After making changes to the configuration, restart the SAP instance to apply the changes.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  RZ10: To maintain profile parameters.
  RZ11: To check the current values of profile parameters.
  RZ03: To view the instance profile.
  
  
  
  Documentation: Refer to the SAP Help Portal for detailed documentation on configuring virtual hosts and SNC settings.
  
  
  Logs: Check the developer trace files (dev_* files) for more detailed error messages that can provide additional context for troubleshooting.
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to SY558.
  
  
  By following these steps, you should be able to resolve the SY558 error and ensure that your SAP system is properly configured for virtual hosting and secure communications.