When I run a test case using Squish (version 6.2.0), is there a way to stop the run from keyboard ?
I know that the Squish toolbar contains a button to do that. Unfortunately, this button is not accessible with the mouse when the test case is running (because the mouse is moved automatically by Squish).
With older Squish version like yours the brute force method is to close the application, or interfere with test script execution so that the application state is different than expected which will cause an object lookup to stall sooner or later, then you have time to use the mouse to operate the Squish control bar.
Another option is to use desktop automation software (AutoHotkey, AutoIt, AutoKey) to close the Squish control bar (regardless of the fact that it does not have the input focus), which will also abort the test script execution.