Sm-g925f cert write error ……………..

Waiting ADB device… OK
Reading phone info…
Model: SM-G925F
Android version: 6.0.1
Product code:
Phone version: G925FXXU4DPG5
PDA version: G925FXXS4DPGE
CSC version: G925FDAX3DPF2
CSC country code: AUSTRIA
CSC sales code: TTR
HW version:
Phone S/N:
Modem board: SHANNON333
RF cal date:
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.25.6

IF I DOWNGRADE MODEM MY MODEM IS GONE UNKNOWN ……………..