Based on a real experience I had on December 30, 2016. I later found out I simply had one of the files open that it was trying to write to.
I used some code from the actual automation to generate this. A co-worker did a double-take when he saw my screen output the text at the very bottom.

For anybody interested, here's the actual source code for this comic, without any actual work done(put an @ sign before first echo, FA mistook it for a user tag):

echo off
color 0C

echo Doing all your work for you
echo.
echo ...
echo ...
echo ...
set loop=0
:loop
echo Access denied
set /a loop=%loop%+1
if "%loop%"=="10" goto next
goto loop
:next
timeout /t 10 >nul
cls
color F0
echo.
echo Closing pod bay doors
echo.
timeout /t 1 >nul
echo Turning off life support......
timeout /t 10 >nul