Problem to unlock g892a oreo 8.0

Operation: Read Codes via Server
Selected model: SM-G892A
Software version: 34.6

Checking Login and Password... OK
Ballance: 30 crd.
You have 30 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-G892A
Android version: 8.0.0
PDA version: G892AUCS3BRG1
CSC version: G892AATT3BRG1
Phone version: G892AUCS3BRG1
Product code: SM2G892AZDAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38K108VQDL
IMEI: 358524081665892
HW version: REV0.5
RF cal date: 2018.01.18
Chip name: MSM8998
Modem board: MSM8998
Security patch: 2018-07-01
Boot Warranty bit: 0
SIM State: ABSENT
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait... OK
Reading data from phone... OK
Searching Ramdump interface... COM19 detected
Reading data from phone... OK
Calculating...
Exception: Access violation at address 0040A48B in module 'SamsungToolPRO.exe'. Read of address 00000000
Done with Samsung Tool PRO v.34.6

I trying many times and i've got the same error
:confused::confused::confused: