[Q] Error at Backup topic

hello, i have KFHD 8.9 with root. Now i want install TWRP. I have installed ADB and is functionally, i can run much codes, for example "adb shell getprop". I using this tutorial http://forum.xda-developers.com/showthread.php?t=2128175&highlight=8+5+1 But when introducing code for backup for my Kindle, show me this message: "[-] no such file or directory". Help, please.