create install media mac os x error

sudo "/Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia" --volume /Volumes/reinstall
Usage: createinstallmedia --volume <path to volume to convert> --applicationpath <path to Install OS X Yosemite.app> [--force]

Arguments--volume, A path to a volume that can be unmounted and erased to create the install media.
--applicationpath, A path to copy of the OS installer application to create the bootable media from.
--nointeraction, Erase the disk pointed to by volume without prompting for confirmation.

Example: createinstallmedia --volume /Volumes/Untitled --applicationpath "/Applications/Install OS X Yosemite.