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Troubleshoot the thin client project

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  • Last UpdatedOct 29, 2026
  • 2 minute read

  • If Microsoft IIS is running, you can get more information on it by opening a browser and entering http://localhost/iishelp in the browser navigation address bar.

  • If you get a Cannot find Server error message:

    • From the browser, ping the server IP address (primary and/or backup). You can ping using the IP address or use the NetBios name to ping the server (for example, from a command prompt enter

    • Ping 152.57.100.25 or Ping ServerName.

    • Be sure IIS is running

    • Be sure your project is running

    • Make sure the TCP/IP Server (in the project's Tasks) is running

    • Be sure IIS is set to the correct Home Page (root directory).

    • Be sure the Port addresses are correct (HTTP – Port 80, HTTPS (SSL) – Port 443, Data – Port 1234)

    • Make sure you firewall has these ports open

    • If you are using a Windows Embedded device, be sure ISSymbol is properly loaded and registered

    • Be sure your runtime license supports the Web Client configuration

      Note: A web server typically operates on, or "listens to", a computer's TCP/IP port 80. Only one process can run on a given port, so if another process on your computer — for example, some third-party SCADA software — is already running on port 80, then it and the web server process might conflict with each other. Either configure one of the processes to run on a different port, or use Task Manager to end the conflicting process. If you cannot identify the conflicting process, run Command Prompt and enter the following command to get a list of all networking processes:

      netstat -a -o

  • If you get a Page cannot be displayed error message,

    • From the browser, ping the server IP address

    • Stop and restart IIS

    • Be sure the MIME types are properly set

    • Make sure you updated your web pages (that is, Save as HTML) and use the Verify Project tool if you change any Web settings.

    • Verify the Windows security settings are properly set

    • Be sure that the Screen name (and Web Page name) do not have any spaces in the name

  • If the web pages are incorrect:

    • Be sure you are pointing to the correct primary URL

    • Be sure your backup URL (if you use it) has the correct (updated) web pages