: If you have ever had a different version of WinCC (e.g., V7.4) or WinCC Professional installed on the system, strongly consider a complete OS reinstall before installing V7.5. The chances of conflict are high.
: Ensure your version of Windows is compatible with WinCC 7.5. For example, WinCC 7.5 SP2 on Windows 10 22H2 often requires or higher to function correctly. You can use the Siemens Compatibility Tool to verify your specific setup. Root Causes & Solutions
Often, a previous WinCC session did not close correctly, leaving a process running in the background that blocks the new startup.
The logged-in Windows user may not belong to the mandatory local user groups created during the WinCC installation. A Basic Application Could Not Be Started Wincc 7.5
If the error only happens with one specific project, the project database might be corrupted. Create a .
If you’ve encountered the error message while working with Siemens WinCC 7.5, you’re not alone. This issue typically occurs when launching the WinCC Explorer or opening a project, and it can bring your HMI development to a halt.
Verify that WinCC 7.5 is installed correctly and that all necessary components are present. Check the installation files and ensure that they are not corrupted. : If you have ever had a different version of WinCC (e
The Automation License Manager (ALM) cannot verify the WinCC RT license.
Before diving into solutions, it is essential to understand why this occurs:
: Conflicts often occur if multiple WinCC versions (e.g., WinCC V7 and WinCC Professional) are installed on the same machine. User Permissions : Ensure you are running WinCC with the same user account used during the initial installation. Siemens SiePortal 3. System Fixes Run "Reset-WinCC" Reset_WinCC.vbs For example, WinCC 7
If the project was not closed properly, the SQL databases might be locked or corrupted. Close WinCC. Navigate to your project folder. Delete any files with the extensions (lock files).
The most common cause is a mismatch between your Windows version and the specific WinCC Service Pack (SP) or Update (Upd).
The project file itself may be corrupted. Create a New Project and try to activate it. If a new project works, your specific project file requires repair (restoring from a backup is recommended).