Fix WinCC Auto-Logout Freeze

Job ID: 40272781

Budget: ₹600 – ₹1,500 INR

My WinCC Explorer 8.1 runtime on a Windows 10 machine should log an operator out automatically; instead, the moment the timer expires the application freezes and never shows the standard SIMATIC logout screen. I first spotted it recently but can’t tie it to any system change, update, or new software installation because, frankly, none have been made.

What I need from you is a clean, reproducible fix. Diagnose whatever is locking the HMI session, apply or guide me through the remedy (configuration tweak, script correction, patch, or hot-fix), and prove that the logout screen appears reliably after the configured idle period.

Acceptance criteria:
• Auto-logout functions without hanging for at least 10 consecutive test cycles.
• No adverse side-effects on existing tags, alarms, or scripts.
• A short write-up of the root cause and the exact steps taken, so the in-house team can replicate it on our remaining stations.

You are welcome to use remote access tools, trace logs, or WinCC diagnostics—whatever you prefer—as long as production remains uninterrupted.