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.
If you prefer not to duplicate the project, you can manually strip away temporary runtime files that might be locking the basic application initialization. Close WinCC and stop the runtime completely. Navigate to your WinCC project root directory. A Basic Application Could Not Be Started Wincc 7.5
Can you open , or does the error happen to all of them? If you’ve encountered the error message while working
Double-click each group and ensure your current Windows login account is explicitly added as a member. Close WinCC and stop the runtime completely
Right-click the Windows Start menu and select . Navigate to System Tools > Local Users and Groups > Groups . Locate the following groups: SIMATIC HMI SIMATIC HMI Viewer SQLServerMSSQLUser$ComputerName$WINCC
WinCC 7.5 / "A basic application could not be started" message