: Ensure your version of Windows 10/11 is compatible with WinCC V7.5. For instance, users have reported that WinCC 7.5 SP2 on Windows 10 Pro 22H2 specifically requires to function correctly. Avoid Parallel Installations
This is the most common scenario. The root cause is almost always SQL Server related. Reinstall WinCC focusing on SQL Server components. If error persists, check Event Viewer for SQL Server-specific exception messages.
: Try running the reset script located on your desktop or in the WinCC installation folder. This often clears stuck background processes that prevent a fresh application start.
15–45 minutes depending on root cause.
Siemens provides a troubleshooting tool often referred to as WinCCReset or checking the system status.
WinCC 7.5 / "A basic application could not be started" message
Prevention is always better than cure. Follow these best practices to avoid encountering the "basic application" error in the first place.
Only install Windows updates that are explicitly validated and approved in the official Siemens Compatibility Tool for WinCC v7.5.
Cut and paste these .dcf files into a backup folder outside of your project directory (WinCC will automatically regenerate clean versions upon the next launch).
WinCC uses DCOM (Distributed Component Object Model) for inter-process communication. If Windows Updates changed DCOM security permissions, WinCC cannot "call
Your Windows user account must belong to specific local groups created during the WinCC installation. Right-click the Start Menu and select . Navigate to Local Users and Groups > Groups .
