Check the (located typically at):
As indicated in Siemens Support forum posts , running an early version of WinCC 7.5 SP2 on newer Windows 10 versions (e.g., 22H2) will trigger this error. Install Update 15 or newer for WinCC 7.5 SP2.
Check the "SQL Server Browser" service as well; it should also be running. 3. Verify SIMATIC Security Settings
: This error is frequently tied to missing or invalid licenses. Open the Automation License Manager (ALM) and confirm you have a valid WinCC RC (Release/Configuration) or RT (Runtime) license active. a basic application could not be started wincc 75 best
Before diving into the fixes, it's crucial to understand that this error message is often misleading. While it directs you to check your software license, the issue can stem from various underlying problems:
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: Download and install the latest available Update (e.g., Update 15 for SP2) for your specific WinCC 7.5 version . Check the (located typically at): As indicated in
Ensure your user account is an explicit member of the and Administrators groups.
If you've tried all the steps above and are still facing the issue, Siemens offers official support channels:
WinCC 7.5 introduced stricter security protocols. If your Windows user account isn't part of the correct local groups, the "basic application" (the engine) will be blocked. Before diving into the fixes, it's crucial to
Restart your PC. But for minimal downtime, use the Services console.
The following solutions are listed from the least to the most invasive. Work your way down the list until the issue is resolved.
If stopped: right-click → Start. If fails to start → reinstall SQL instance (Fix 6).
Before diving into deep technical fixes, ensure your version of Windows 10/11 is compatible with your specific WinCC 7.5 Service Pack (SP).
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.