WinCC uses a named SQL instance (e.g., WINCC). If SQL isn’t running, WinCC cannot start.
WinCC depends on:
If these are disabled or corrupted, basic applications fail to start. a basic application could not be started wincc 75
WinCC 7.5 requires administrative privileges. If the user launching runtime does not have full read/write access to the project folder, %ProgramData%\Siemens\, or the SQL Server instance, basic apps will abort. WinCC uses a named SQL instance (e
| Step | Action |
|------|--------|
| 1 | Verify WinCC Services are running: CCBMSvc.exe, CCBasicApplication.exe, SQL Server (WINCC) |
| 2 | Check Windows Event Viewer → Application log for .NET or WinCC-specific errors |
| 3 | Run CCBasicApplication.exe manually from \bin\ folder to see detailed error |
| 4 | Test with a new empty WinCC project (to rule out project corruption) |
| 5 | Disable antivirus temporarily (add WinCC folders to exclusions permanently) |
| 6 | Reinstall WinCC 7.5 if system files are missing (repair option via Setup) |
| 7 | Ensure Windows user is in Siemens WinCC, SQLServer2005MSSQLUSER, and Administrators groups | WinCC depends on:
If the error persists, you may be dealing with deeper system damage:
Once you get WinCC running again, avoid a repeat of the error by following these best practices: