ERROR: Failed to receive handshake response. Result: -7

rassawyer@rassawyer-MacBook:~/Android/Galaxy-S5/att-firmware$ sudo heimdall print-pit --verbose --usb-log-level debug
Heimdall v1.4.1

Copyright (c) 2010-2014 Benjamin Dobell, Glass Echidna
http://www.glassechidna.com.au/

This software is provided free of charge. Copying and redistribution is
encouraged.

If you appreciate this software and you would like to support future
development please consider donating:
http://www.glassechidna.com.au/donate/

Initialising connection...
Detecting device...
[timestamp] [threadID] facility level [function call] <message>
--------------------------------------------------------------------------------
[ 0.007197] [0000510f] libusb: debug [libusb_get_device_list]
[ 0.007299] [0000510f] libusb: debug [discovered_devs_append] need to increase capacity
[ 0.007343] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007369] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007394] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007419] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007444] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007469] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007495] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007520] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007550] [0000510f] libusb: debug [libusb_open] open 1.12
[ 0.007629] [0000510f] libusb: debug [usbi_add_pollfd] add fd 11 events 4
[ 0.007677] [0000510f] libusb: debug [libusb_get_device_descriptor]
[ 0.007723] [0000510f] libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line)
[ 0.007793] [0000510f] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 0.007828] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 60000ms
[ 0.007864] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 0.007898] [0000510f] libusb: debug [reap_for_handle] urb type=2 status=0 transferred=4
[ 0.007926] [0000510f] libusb: debug [handle_control_completion] handling completion status 0
[ 0.007954] [0000510f] libusb: debug [disarm_timerfd]
[ 0.007982] [0000510f] libusb: debug [usbi_handle_transfer_completion] transfer 0x1419090 has callback 0x7f7911c56110
[ 0.008011] [0000510f] libusb: debug [sync_transfer_cb] actual_length=4
[ 0.008053] [0000510f] libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line)
[ 0.008092] [0000510f] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 0.008122] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 60000ms
[ 0.008216] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 0.008246] [0000510f] libusb: debug [reap_for_handle] urb type=2 status=0 transferred=18
[ 0.008259] [0000510f] libusb: debug [handle_control_completion] handling completion status 0
[ 0.008269] [0000510f] libusb: debug [disarm_timerfd]
[ 0.008282] [0000510f] libusb: debug [usbi_handle_transfer_completion] transfer 0x1419090 has callback 0x7f7911c56110
[ 0.008293] [0000510f] libusb: debug [sync_transfer_cb] actual_length=18
      Manufacturer: "Sasmsung"
[ 0.008318] [0000510f] libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line)
[ 0.008345] [0000510f] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 0.008357] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 60000ms
[ 0.008488] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 0.008511] [0000510f] libusb: debug [reap_for_handle] urb type=2 status=0 transferred=4
[ 0.008522] [0000510f] libusb: debug [handle_control_completion] handling completion status 0
[ 0.008532] [0000510f] libusb: debug [disarm_timerfd]
[ 0.008543] [0000510f] libusb: debug [usbi_handle_transfer_completion] transfer 0x1419090 has callback 0x7f7911c56110
[ 0.008554] [0000510f] libusb: debug [sync_transfer_cb] actual_length=4
[ 0.008570] [0000510f] libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line)
[ 0.008591] [0000510f] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 0.008603] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 60000ms
[ 0.008718] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 0.008738] [0000510f] libusb: debug [reap_for_handle] urb type=2 status=0 transferred=16
[ 0.008748] [0000510f] libusb: debug [handle_control_completion] handling completion status 0
[ 0.008790] [0000510f] libusb: debug [disarm_timerfd]
[ 0.008802] [0000510f] libusb: debug [usbi_handle_transfer_completion] transfer 0x1419090 has callback 0x7f7911c56110
[ 0.008812] [0000510f] libusb: debug [sync_transfer_cb] actual_length=16
           Product: "MSM8960"

            length: 18
      device class: 2
               S/N: 0
           VID:PID: 04E8:685D
         bcdDevice: 0100
   iMan:iProd:iSer: 1:2:0
          nb confs: 1
[ 0.008871] [0000510f] libusb: debug [libusb_get_config_descriptor] index 0

interface[0].altsetting[0]: num endpoints = 1
   Class.SubClass.Protocol: 02.02.01
       endpoint[0].address: 82
           max packet size: 0010
          polling interval: 09

interface[1].altsetting[0]: num endpoints = 2
   Class.SubClass.Protocol: 0A.00.00
       endpoint[0].address: 81
           max packet size: 0200
          polling interval: 00
       endpoint[1].address: 01
           max packet size: 0200
          polling interval: 00
Claiming interface...
[ 0.008972] [0000510f] libusb: debug [libusb_claim_interface] interface 1
Setting up interface...
[ 0.009019] [0000510f] libusb: debug [libusb_set_interface_alt_setting] interface 1 altsetting 0

Initialising protocol...
[ 0.009062] [0000510f] libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line)
[ 0.009070] [0000510f] libusb: debug [submit_bulk_transfer] need 1 urbs for new transfer with length 4
[ 0.009078] [0000510f] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 0.009083] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 60000ms
[ 0.009478] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 0.009489] [0000510f] libusb: debug [reap_for_handle] urb type=3 status=0 transferred=4
[ 0.009495] [0000510f] libusb: debug [handle_bulk_completion] handling completion status 0 of bulk urb 1/1
[ 0.009500] [0000510f] libusb: debug [handle_bulk_completion] last URB in transfer --> complete!
[ 0.009505] [0000510f] libusb: debug [disarm_timerfd]
[ 0.009512] [0000510f] libusb: debug [usbi_handle_transfer_completion] transfer 0x1419090 has callback 0x7f7911c56110
[ 0.009517] [0000510f] libusb: debug [sync_transfer_cb] actual_length=4
[ 0.009526] [0000510f] libusb: debug [add_to_flying_list] arm timerfd for timeout in 1000ms (first in line)
[ 0.009533] [0000510f] libusb: debug [submit_bulk_transfer] need 1 urbs for new transfer with length 7
[ 0.009543] [0000510f] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 0.009549] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 60000ms
[ 1.009626] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 1.009688] [0000510f] libusb: debug [handle_events] timerfd triggered
[ 1.009709] [0000510f] libusb: debug [libusb_cancel_transfer]
[ 1.009876] [0000510f] libusb: debug [disarm_timerfd]
[ 1.009899] [0000510f] libusb: debug [handle_events] poll() 4 fds with timeout in 0ms
[ 1.009913] [0000510f] libusb: debug [handle_events] poll() returned 1
[ 1.009930] [0000510f] libusb: debug [reap_for_handle] urb type=3 status=-2 transferred=0
[ 1.009942] [0000510f] libusb: debug [handle_bulk_completion] handling completion status -2 of bulk urb 1/1
[ 1.009953] [0000510f] libusb: debug [handle_bulk_completion] abnormal reap: urb status -2
[ 1.009963] [0000510f] libusb: debug [handle_bulk_completion] abnormal reap: last URB handled, reporting
[ 1.009974] [0000510f] libusb: debug [usbi_handle_transfer_cancellation] detected timeout cancellation
[ 1.009985] [0000510f] libusb: debug [disarm_timerfd]
[ 1.009996] [0000510f] libusb: debug [usbi_handle_transfer_completion] transfer 0x1419090 has callback 0x7f7911c56110
[ 1.010007] [0000510f] libusb: debug [sync_transfer_cb] actual_length=0
ERROR: Failed to receive handshake response. Result: -7
ERROR: Protocol initialisation failed!

Releasing device interface...
[ 1.010089] [0000510f] libusb: debug [libusb_release_interface] interface 1

[ 1.010140] [0000510f] libusb: debug [libusb_close]
[ 1.010163] [0000510f] libusb: debug [usbi_remove_pollfd] remove fd 11
[ 1.010200] [0000510f] libusb: debug [libusb_exit]
[ 1.010211] [0000510f] libusb: debug [libusb_exit] destroying default context
rassawyer@rassawyer-MacBook:~/Android/Galaxy-S5/att-firmware$