The error in WinCC 7.5 often occurs due to software incompatibilities, incorrect installation conditions, or issues with the SQL Server instance.
The "A basic application could not be started" error in WinCC 7.5 is a frequent stumbling block often tied to deep-seated configuration issues rather than just a missing file a basic application could not be started wincc 75
For many Siemens automation environments, disabling entirely is the standard solution. The error in WinCC 7