A mismatch between the application access point and the network card causes runtime failures.
WinCC 7.5 is notorious for path sensitivity.
Here is the troubleshooting hierarchy. Start with #1; it solves 80% of cases.
If you’ve encountered the error message while working with Siemens WinCC 7.5, you’re not alone. This issue typically occurs when launching the WinCC Explorer or opening a project, and it can bring your HMI development to a halt.
Double-click the group and ensure your active Windows login account is listed as a member. A Basic Application Could Not Be Started Wincc 7.5
Why this works: WinCC 7.5 needs to write to protected system folders (like C:\ProgramData\Siemens\ ) and register COM objects at runtime.
To prevent the "A basic application could not be started" error in WinCC 7.5, ensure that:
When WinCC fails to start, it is usually because the foundational services cannot interact properly. Key culprits include:
WinCC is very particular about which user accounts are allowed to run it. The logged-in Windows user . This is a local Windows group created during the WinCC installation. If a user is not part of this group, or if the group itself is damaged, WinCC will block basic applications from starting. This is especially common in corporate environments with domain policies that restrict local group memberships. A mismatch between the application access point and
If the error occurs during project activation, background processes may be stuck in a deadlocked state. Close all Siemens applications.
If you have tried DEP, Admin rights, SQL, and the cache delete without success, you are likely dealing with a .
When the system says a basic application could not be started, it typically means that one of these critical background services failed to initialize within a specific timeout period, or a necessary file dependency is missing or corrupted.
Check the WinCC 7.5 configuration to ensure that it is set up correctly. Verify that the project settings, device configurations, and other parameters are correctly configured. Start with #1; it solves 80% of cases
: Run the reset_wincc.vbs script (located in the WinCC installation folder) and restart your computer.
If running WinCC 7.5 in a VM:
To prevent the "Basic Application Could Not Be Started" error from recurring on production machines:
Abrupt shutdowns, power failures, or antivirus interference can corrupt the .mdf and .ldf project files.