Of course, this should be of no surprise to you
A long time ago, "build" was taking a long time and I wanted to make a beep when it finished. I made a beep.txt file that contained a beep character so I could open a command box and type "type beep.txt" and hear a chime. Then I edited into my project's "Post Build Event Command Line" to type this file. But it never worked, instead taking a few seconds not to beep.
So today, I decided to remove the post build event command line. But now, my build always fails. It seems it still expects something for this post build event. I'd show you but the *&&^$ studio won't copy the text from the output window.