Samsung SM-G930P unlock failed, plese help

i tried to unlock samsung s7 with z3x but unlock failed ,hereis the operation log

Operation: Unlock
Selected model: SM-G930P
Software version: 37.0

Waiting ADB device... OK
Reading phone info...
Model: SM-G930P
Android version: 8.0.0
PDA version: G930PVPSACSF1
CSC version: G930PSPTACSF1
Phone version: G930PVPSACSF1
Product code: Not Active
CSC country code: USA
CSC sales code: BST
Phone SN: 00000000000
IMEI: 353562087372209
HW version: REV0.6
RF cal date: 2018.01.03
Chip name: MSM8996
Modem board: MSM8996
Security patch: 2019-06-01
Boot Warranty bit: 0
Writing AT RIL... OK
Initialization AT RIL... OK
Unlocking... error
Done with Samsung Tool PRO v.37.0