MATLAB: Do I get the “ERR_CONNECT_FAIL” error when opening Simulink Start Page or SDI

simulink

When attempting to open a Simulink based UI, mostly either the Simulink Start Page or the SDI, it opens a new window, but displays an error message.
The error message either shows "503 Service Unavailable", ERR_CONNECT_FAIL, or both.
 

Best Answer

A possible solution to this is to change the network configuration options on the machine such that it is able to establish a loopback connection by opening and closing ports and communicating through the localhost. In some situations, users' configuration may block or have some form of proxy that reroutes localhost traffic. In these situations, the connector may fail to communicate properly.
On Windows 7, navigate to Internet Explorer (or Control Panel -> Network settings) -> Internet Options -> Connections -> LAN Settings -> turn ON "Bypass proxy server for local addresses", with "Use a proxy server for you LAN" most likely already ON.
On Mac OS X, navigate to System Preferences -> Network -> Advanced -> Proxies -> turn ON "Exclude simple hostnames".
 
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