Cant Seem To find disc drive

I hope this is the right place im new to GitHub but I was trying out your script today and it seem the script cant find my disc drive I point the script to said disc drive and it spits out "D:AutoHandBrake-master/autohb.rb:138:in ' ' ': no such file or directory - HandbrakeCLI -if:" -o D: -t 0 --scan 2>&1 (Errno: : ENOENT" I have no clue what that means anyway you can maybe help?? thanks! 
