Long file paths or special characters in the project folder name.
Alternatively, use the tool. You can find this in the WinCC installation directory (usually bin folder). Running this script terminates all background WinCC processes safely. 4. Verify SQL Server (WinCC Instance) WinCC 7.5 uses a specific SQL instance named WINCC . Press Win + R , type services.msc , and hit Enter. Locate SQL Server (WINCC) .
Sometimes the internal project status gets "stuck" in a running state even when it's closed. Close WinCC completely.
Troubleshooting: "A Basic Application Could Not Be Started" in WinCC 7.5 A Basic Application Could Not Be Started Wincc 7.5
: Real-time protection (like Windows Defender) can block critical files during installation.
Encountering the error message when launching Siemens WinCC V7.5 can be a major roadblock. This error typically suggests that a core component of the WinCC runtime or explorer is failing to initialize, often due to permission conflicts, database issues, or corrupted installation files.
Before diving into solutions, it is essential to understand why this occurs: Long file paths or special characters in the
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Recent operating system updates altering security policies or DCOM settings. Step-by-Step Troubleshooting Network
WinCC stores project data and runtime configurations in user-specific folders. Press Win + R , type services
: Ensure your Windows user is a member of the required Siemens user groups (e.g., SIMATIC HMI).
Siemens WinCC requires strict Windows user privileges to execute its basic applications and access the SQL database.