How To Fix SY559 - Virtual host is not configured: &1, port &2, with SNC

SY559 - Overview

• Message type: E = Error

• Message class: SY - ABAP/4 system messages

• Message number: 559

• Message text: Virtual host is not configured: &1, port &2, with SNC

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SY559 - Virtual host is not configured: &1, port &2, with SNC ?

  The SAP error message SY559 indicates that there is an issue with the configuration of a virtual host in the context of Secure Network Communications (SNC). This error typically arises when the system is trying to establish a connection using SNC, but the specified virtual host and port are not properly configured in the SAP system.
  
  Cause:
  
  Missing Configuration: The virtual host and port specified in the SNC settings are not configured in the SAP system.
  Incorrect Hostname or Port: The hostname or port number provided in the SNC settings may be incorrect or not reachable.
  Network Issues: There may be network issues preventing the connection to the specified virtual host.
  SNC Library Issues: The SNC library may not be properly installed or configured on the SAP application server.
  
  
  Solution:
  
  
  Check SNC Configuration:
  
  Go to transaction RZ10 and check the profile parameters related to SNC, such as snc/enable, snc/identity/as, and snc/identity/client.
  Ensure that the virtual host and port are