[Crash-utility] /dev/tty no such device or address

I am trying to invoke the crash utility through one of the linux startup scripts. crash -i command.txt vmlinux vmcore But this gives an error /dev/tty no such device or address. The tty is /dev/console Once the linux box boots up and i login and use the same crash command as above it works correctly The tty of the login shell is /dev/ttyS0 Any pointers on solving the error "/dev/tty no such device or address" Thanks