To help diagnose why your WinCC Viewer RT download or connection is failing, tell me a bit more about your setup:
If the standard WinCC Viewer RT download continues to fail, use the approach: wincc viewer rt download fix
Comprehensive Guide to Fixing Siemens WinCC Viewer RT Download and Connection Issues To help diagnose why your WinCC Viewer RT
Siemens SIMATIC WinCC Runtime Advanced and Professional utilize (Runtime Viewer) to allow operators to remotely monitor and control HMI screens via a PC or thin client. However, configuring, downloading, and launching WinCC Viewer RT often presents specific technical challenges. wincc viewer rt download fix