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

T5196 - Overview

• 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

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.

T5196 - Details

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