A Basic Application Could Not Be Started Wincc 7.5 May 2026

Sometimes the compressed project archive is the problem.

If core files are missing:

If the project was not closed properly (e.g., power loss, crash), the internal runtime database may be locked or corrupted. A Basic Application Could Not Be Started Wincc 7.5

Confirm the reset.

Activate the project (Start Runtime).

Data Execution Prevention (DEP) is a Microsoft security feature that sometimes flags older WinCC processes as threats. Sometimes the compressed project archive is the problem

Click Apply, OK, and Restart your computer.

If running WinCC 7.5 in a VM:

WinCC 7.5 is highly sensitive to Windows user permissions. Running without Administrator rights is the number one cause. Confirm the reset

Siemens has released several updates (Upd4, Upd5, etc.) that fix startup and service-related bugs.