A Basic Application Could Not Be Started Wincc 75 Best Official

Set UAC to lowest level:

Open Command Prompt as Administrator and run: a basic application could not be started wincc 75 best

regsvr32 "C:\Program Files (x86)\Common Files\Siemens\Bin\CCBasicApplication.dll"
regsvr32 "C:\Program Files (x86)\Siemens\WinCC\bin\CCBasicApplicationServer.exe"

(Adjust paths to your installation)

WinCC 7.5 uses SQL Server for its tag logging and alarm logging archives. If the SQL Server instance (usually WinCC) is stopped, the basic application cannot initialize the database connection. Set UAC to lowest level:

The Basic Application relies on specific Windows services. Verify they are running. Open Command Prompt as Administrator and run: regsvr32

If WinCC crashed previously, background processes may still be running, preventing a new instance from starting. The operating system sees these "zombie" processes and thinks the project is already active.

If the environment is clean, the issue may lie within the project structure or the license configuration.