How To Fix GW729 - Connections using this port are only allowed for SNC connections

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 729

• Message text: Connections using this port are only allowed for SNC connections

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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 GW729 - Connections using this port are only allowed for SNC connections ?

  The SAP error message GW729 indicates that there is an issue with the connection type being used for a particular port. Specifically, it states that connections using this port are only allowed for Secure Network Communications (SNC) connections. This typically occurs when a non-SNC connection is attempted on a port that is configured to accept only SNC connections.
  Cause:
  
  Port Configuration: The port you are trying to use is configured to accept only SNC connections. This is often the case for ports that are set up for secure communication.
  SNC Configuration: The SNC settings may not be properly configured on the client or server side, leading to the inability to establish a secure connection.
  Client Settings: The client application may not be set up to use SNC, or it may not have the necessary SNC libraries or configurations in place.
  
  Solution:
  
  Check Port Configuration: Verify the configuration of the port in the SAP system. Ensure that it is indeed set to accept only SNC connections and that you are using the correct port for your connection type.
  Enable SNC on Client: If you intend to use SNC, ensure that the client application is configured to use SNC. This may involve:
  
  Installing the necessary SNC libraries.
  Configuring the client to use SNC by setting the appropriate parameters in the SAP GUI or other client applications.
  
  
  Review SNC Settings: Check the SNC settings in the SAP system:
  
  Ensure that the SNC name is correctly configured in the SAP profile parameters (e.g., snc/enable should be set to true).
  Verify that the SNC library is correctly installed and accessible.
  Check the snc/identity/as parameter to ensure it is set correctly.
  
  
  Test Connection: After making the necessary changes, test the connection again to see if the error persists.
  
  Related Information:
  
  SNC Overview: Secure Network Communications (SNC) is a security protocol that provides encryption and authentication for SAP communications. It is important for protecting sensitive data during transmission.
  SAP Notes: Check SAP Notes related to SNC and GW729 for any specific patches or updates that may address known issues.
  Documentation: Refer to the official SAP documentation for detailed instructions on configuring SNC and troubleshooting connection issues.
  
  If the problem persists after following these steps, consider reaching out to your SAP Basis team or SAP support for further assistance.