WinCC relies on the SIMATIC Shell for terminal bus communication. Open Windows File Explorer on the client PC. Scroll down to This PC and click on SIMATIC Shell .
Re-enter the Server IP Address/Name, the starting screen, and user credentials. Save this as a new .pcc file on your desktop. Issue C: "User Has No Authorization" wincc viewer rt download fix
What displays when the download or connection fails? WinCC relies on the SIMATIC Shell for terminal
Navigate to your project's license folder and delete the file RTViewer_[ComputerName].key . Re-enter the Server IP Address/Name, the starting screen,
If the viewer fails to open or prompts for a configuration that won't save, deleting the local XML configuration file often resolves the issue. Navigate to
WinCC Viewer RT communicates via HTTP (Port 80) or HTTPS (Port 443) for configuration downloads, but utilizes Port 443 or specific WinCC ports (like 5001) for data tunneling.
On both machines, open Computer Management > Local Users and Groups > Groups .