How to I make my program release memory?

[Plecto]

Why is this happening though? Why does it insist of storing these variables in memory despite crashing the program doing so?

pi@raspberrypi:~ $ sudo dd if=/dev/zero of=/path/swap.img bs=2048 count=1M

dd: failed to open '/path/swap.img': No such file or directory

:(

Thanks for the replies by the way, I would really want to fix this issue :(