SM-G925t unlock error

Operation: Unlock
Selected model: SM-G925T
Software version: 26.6

Waiting ADB device… OK
Reading phone info…
Model: SM-G925T
Android version: 6.0.1
Product code: SM-G925TZKETMB
Phone version: G925TUVU4EPF1
PDA version: G925TUVU4EPF1
CSC version: G925TTMB4EPF1
CSC country code: USA
CSC sales code: TMB
HW version: REV0.2
Phone S/N: R58G319G2ZP
Modem board: SHANNON333
RF cal date: 20150317
IMEI:
Checking Super user right… true
Initializating zTool… OK
Running zTool, please wait…
Start… OK
Init… OK
Generate and check client proof… OK
Verify proof by client… OK
Reading data… error (9)

Done with Samsung Tool PRO v.26.6