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.
WinCC 7.5 relies heavily on . If the SQL service isn't running, the WinCC Explorer cannot initialize. The Fix: Press Win + R , type services.msc , and hit Enter. Find SQL Server (WinCC) . a basic application could not be started wincc 75
Right-click your license and select to ensure it isn't corrupted. 2. Reset the WinCC Project (CCCleaner) If none of these steps work, the issue
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 WinCC 7
How to Fix "A Basic Application Could Not Be Started" in WinCC 7.5
Sometimes, background processes from a previous session don't close properly, preventing a new "basic application" from launching. Close WinCC and all SIMATIC software.