Security Device Not Found Please Attach Your Dongle And Restart The Software Upd May 2026

The error mentions "restart the software updater" specifically. This is crucial. The updater process runs as a background service (e.g., hasplms.exe for Sentinel or CodeMeter.exe). Even if your dongle works in the main application, the updater runs under different system privileges.

Provide function restartApp() and softRestart() for session-preserving flows.

Retry/backoff logic: poll USB state every 2s for 30s, then switch to event-driven (OS USB hotplug).

The error can appear during software installation, while running a live application, or when attempting to apply a patch or firmware update. Here are the most common causes: The error can appear during software installation, while