full desktop backup using adb not working with yu yureka
it means, the device, haven't any PIN password.

just do this :


  Goto Settings &gt; LockScreen &gt; Screen Lock


and set the password for PIN and after this, try again for backup and it showing you for enter the PIN password and then, Backup process will be starting.



Edit :

after Set the PIN, use this Command :


  adb backup -all


this command will be show to you the windows like this :