A Basic Application Could Not Be Started Wincc 75 Online

"A basic application could not be started"

The error message in SIMATIC WinCC 7.5 usually indicates a conflict between the software, its required SQL Server instance, or the operating system's compatibility . Common Root Causes

Disable Antivirus/Firewall:

During installation and deep troubleshooting, disable 3rd party firewalls. If the error disappears, you need to add WinCC exceptions to your security software. a basic application could not be started wincc 75

wincc problem (a basic application could not be started ) - SiePortal "A basic application could not be started" The

Quick checks to try immediately

Check Windows User Groups

: The active Windows user must be a member of the "SIMATIC HMI" local user group. Common Root Causes Check SQL Server service (MSSQLSERVER or named instance

• Check SQL Server service (MSSQLSERVER or named instance used by WinCC). Start if stopped.
• Try connecting with SQL Server Management Studio (SSMS) using same credentials/config. Look for corrupt tables, full disk, or login failures.
• If using integrated WinCC Archive, ensure its DB files exist and backup/repair if needed.

Preventive Measures for WinCC 7.5

Network Status:

In WinCC 7.5 SP2, the terminal bus adapter must be connected to a network (switch or router) for certain components to initialize. Step-by-Step Troubleshooting

WinCC Project Duplicator

Project corruption is a leading cause. Use the (Start menu → Siemens Automation → WinCC → Tools):