To fix the problem, we must first understand what WinCC means by a "basic application." WinCC is not a single monolithic executable; it is a suite of interconnected applications and services working in harmony. When the Runtime is activated, the attempts to start several background processes.
If the error occurs only with a specific project, there may be "zombie" processes or temporary lock files (.lck) preventing a clean start. Close all WinCC windows. A Basic Application Could Not Be Started Wincc 7.5
If the SQL Server instance is stopped, WinCC cannot load the project structure or tag logging data. To fix the problem, we must first understand