If your WinCC project folder was moved or copied from another machine, the "basic application" might fail because it doesn't have permission to write to the project database. Right-click your project folder. Go to Properties > Security . Ensure the "SIMATIC HMI" user group has Full Control .
Sometimes, background processes from a previous session don't close properly, preventing a new "basic application" from launching. Close WinCC and all SIMATIC software.
Right-click your license and select to ensure it isn't corrupted. 2. Reset the WinCC Project (CCCleaner) a basic application could not be started wincc 75
Ensure the status is . If it is stopped, right-click and select Start . Also, ensure the SQL Server Browser service is running. 4. Simatic Shell Configuration
Ensure the correct network adapter is selected (the one physically connected to the PLC or server network). 5. Windows Updates and Compatibility If your WinCC project folder was moved or
Run the tool. It will terminate all lingering WinCC processes and clean up the temporary runtime environment. Restart your computer and try opening the project again. 3. Check SQL Server Instance
Open your Windows search bar and type (Reset WinCC). Ensure the "SIMATIC HMI" user group has Full Control
WinCC 7.5 has strict compatibility requirements regarding Windows 10/11 builds and .NET Framework versions.
Ensure you haven't upgraded to WinCC 7.5 while still holding a 7.4 license; Siemens licenses are version-specific.
If none of these steps work, the issue might be a corrupted project file ( .mcp ). Try creating a brand new project . If the new project opens, your original project database may need a manual attach/detach in SQL Management Studio.
