: Ensure the WebNavigator port (default 80 for HTTP or 443 for HTTPS) is not blocked by a local or corporate firewall. Quick Tips for Configuration WinCCViewer RT - SiePortal - Siemens
If you are trying to deploy a (WebNavigator client) and hitting a "Download Failed" or "No connection to server" wall, you aren't alone. These issues usually stem from mismatched network settings, missing Windows components, or corrupted local project files. wincc viewer rt download fix
: Ensure ASP.NET 4.5 (or higher) and Internet Information Services (IIS) are enabled in "Turn Windows features on or off". : Ensure the WebNavigator port (default 80 for
: Ensure the OS version on the HMI device matches the configuration software version. Verify SQL Server Settings SQL Server Configuration Manager SQL Server Services , right-click SQL Server Agent (WINCC) Properties , and change the "Log on as" setting to Network Service Manual Transfer (Workaround) : Ensure ASP