Sometimes the main project file ( .mcp ) or the Global Script library has a logical error preventing startup.
: Check your Automation License Manager to ensure all necessary WinCC 7.5 licenses are present and valid .
Navigate to C:\Program Files (x86)\Siemens\WinCC\bin (or similar path) and run or use CCCleaner.exe -terminate via command line.
The "A basic application could not be started" error in WinCC 7.5 can be frustrating and disrupt productivity. By understanding the common causes of this error and following the troubleshooting steps outlined in this article, you can resolve the issue and get back to work. Additionally, by following best practices to avoid the error, you can minimize the risk of encountering this issue in the future. If you are still experiencing issues, it may be helpful to contact Siemens support or a qualified WinCC 7.5 expert for further assistance. a basic application could not be started wincc 75 best
Ensure you have the Siemens Compatibility Tool installed to verify your Windows 10/11 version (e.g., 22H2) is supported.
Open the SIMATIC Security Controller from the Windows Start menu.
The SQL service WinCC did not start correctly, preventing database access. Sometimes the main project file (
: If all else fails, the most reliable "last resort" is a fresh installation of the operating system followed by WinCC 7.5.
To ensure you never see "A basic application could not be started" again, follow these golden rules for WinCC 7.5:
| Best Practice | Why It Matters | | :--- | :--- | | | After a successful WinCC installation, immediately install the latest Update for your specific version (e.g., WinCC V7.5 SP2 Update 18). Missing critical updates is a known cause of this error. | | Handle OS Changes with Care | After installing WinCC, avoid major system changes like joining or leaving a Windows domain, or significantly altering user account passwords, as these can break SQL Server linkages. | | Check the ALM Version | The Automation License Manager (ALM) is critical for license handling. If you suspect license issues, ensure you have the latest ALM version installed from the Siemens website. | The "A basic application could not be started"
Go to the project folder, delete the .lck (lock) file, and delete the GraCS (Graphics) folder contents if they are corrupted.
: The logged-in user must be a member of the local "SIMATIC_HMI" user group .
This error typically occurs when WinCC is unable to launch one of its core background services (e.g., Graphics Runtime, Alarm Logging, Tag Management, or the Cross-Manager). It prevents the runtime project from starting.
If the error persists, the SQL instance may be corrupted. Users often find success by completely uninstalling WinCC and the manual removal of all MS SQL Server components before reinstalling. Community Insights on Fixes
Navigate to Windows Logs → Application . Look for errors from: