Why this works: SQL Server services and license daemons require elevated privileges to write logs and check licenses. Sometimes, background services crash or become stuck in a "Starting" or "Stopping" state. A simple Windows restart doesn’t always fix this because services are set to "Automatic."
| Step | Action | Time | |------|--------|------| | 1 | Run as Administrator | 10 sec | | 2 | Restart SQL Service (services.msc) | 30 sec | | 3 | Check Dongle / License Manager | 30 sec | | 4 | Delete cache folders ( GRACS , NO_MSG ) | 20 sec | | 5 | Restart PC | 2 min | a basic application could not be started wincc 75 best
If none of these work, you are likely dealing with a corrupted SQL instance or a Windows OS conflict. In that case, the "best" ultimate solution is a (the officially recommended OS for WinCC 7.5) followed by a fresh WinCC installation. Conclusion The error message "A basic application could not be started" in WinCC 7.5 is intimidating, but it is almost always fixable using the 7 methods above. Start with permission and service restarts, then move to cache clearing and SQL repair. The most overlooked fix is checking the license manager – a surprising number of users find that their license dongle simply came loose or the ALM service crashed. Why this works: SQL Server services and license
Remember: WinCC 7.5 is a robust system, but it depends heavily on the underlying Windows infrastructure. Treat your WinCC engineering station like a medical life-support system – no unnecessary software, no automatic updates, and always, always keep a full backup image of the hard drive. In that case, the "best" ultimate solution is