Navigate to the WinCC Bin folder and run Reset_WinCC.vbs . This script terminates all hanging WinCC processes. Restart your PC immediately afterward and try opening the project again.
: Mismatches between your specific Windows Build number and the installed WinCC V7.5 Service Pack (SP). 🛠️ Step-by-Step Resolution Blueprint a basic application could not be started wincc 75 best
| Cause Category | Specific Issue | |----------------|----------------| | | WinCC runtime services lack administrator rights or UAC blocks processes. | | Antivirus / Firewall | Real-time scan blocks RTMessages.exe , PdlRt.exe , or CCEServer.exe . | | License Malfunction | Missing or corrupted license for the basic runtime (e.g., RT 128/512/1024). | | Project Corruption | Damaged .mdf / .ldf database files or inconsistent project configuration. | | SQL Server Issues | SQL Server 2016/2019 instance for WinCC not running or blocked. | | Windows Updates | Recent .NET or VC++ redistributable updates breaking WinCC dependencies. | | Multi-User Conflicts | Another WinCC runtime or demo project already active. | Navigate to the WinCC Bin folder and run Reset_WinCC