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How To Fix T5196 - Communication error: Connection to external program cannot be established


SAP Error Message - Details

  • Message type: E = Error

  • Message class: T5 - SAPphone: Messages for telephony

  • Message number: 196

  • Message text: Communication error: Connection to external program cannot be established

  • Show details Hide details
  • What causes this issue?

    A program was to be started on a remote computer by RFC. The RFC
    destination called is &V2&. The following error occurred: &V1&.
    Possible causes are:
    The RFC destination contains incorrect entries, that is, the entry as
    to where the program to be started is found is incorrect.
    The program is not installed on the specified computer, is installed in
    the wrong directory, or is not operational.

    System Response

    The function terminates.

    How to fix this error?

    Check the settings for the above RFC destination.

    Error message extract from SAP system. Copyright SAP SE.


Smart SAP Assistant

  • What is the cause and solution for SAP error message T5196 - Communication error: Connection to external program cannot be established ?

    The SAP error message T5196, which states "Communication error: Connection to external program cannot be established," typically occurs when there is an issue with the connection between SAP and an external program or system. This can happen in various scenarios, such as when using external applications, middleware, or when integrating with third-party systems.

    Causes:

    1. Network Issues: There may be network connectivity problems between the SAP system and the external program.
    2. Configuration Errors: Incorrect configuration settings in the SAP system or the external program can lead to communication failures.
    3. Firewall Restrictions: Firewalls or security settings may be blocking the connection to the external program.
    4. Service Availability: The external program or service may be down or not running.
    5. Incorrect Parameters: The parameters used to establish the connection (like host, port, etc.) may be incorrect.
    6. Authorization Issues: The user or service account may not have the necessary permissions to access the external program.

    Solutions:

    1. Check Network Connectivity: Ensure that the network connection between the SAP system and the external program is stable and functioning. You can use tools like ping or traceroute to diagnose network issues.
    2. Review Configuration Settings: Verify the configuration settings in both SAP and the external program. Ensure that the connection parameters (host, port, etc.) are correct.
    3. Firewall and Security Settings: Check firewall rules and security settings to ensure that they allow traffic between the SAP system and the external program.
    4. Service Status: Confirm that the external program or service is running and accessible. You may need to restart the service if it is down.
    5. Test Connection: Use transaction codes like SM59 (for RFC connections) to test the connection settings in SAP. This can help identify if the connection can be established successfully.
    6. Check Logs: Review the SAP application logs and the logs of the external program for any error messages that could provide more context on the issue.
    7. User Permissions: Ensure that the user or service account used for the connection has the necessary permissions to access the external program.

    Related Information:

    • SAP Notes: Check SAP Notes for any known issues or patches related to the error message T5196.
    • Documentation: Refer to the official SAP documentation for guidance on configuring external connections and troubleshooting communication errors.
    • Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.

    By systematically checking these areas, you should be able to identify and resolve the cause of the T5196 error message.

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