Closing my app using .Close sometimes return "The [xxx].exe process crashed."

Hi, for closing my apps, I'm using the TestComplete Method ".Close".

Sys.Process(PROC_NAME).QtObject("MainWindow").Close

PROC_NAME is initialised before with the process name, and the QtObject MainWindow exists (checked before).

Sometimes, when I call this method, a few seconds later, I got "The [xxx].exe process crashed." with an Exception code = 0xC0000005.

This exception code seems to be related with some sort of memory address violation.

I don't really understand why I get this error, since the window is successfully closed and the process terminated (as expected).

Thanks for your support.