What is this z3x teamunlocking credit cut but show calculating error

Checking Login and Password... OK
Ballance: 20 crd.
You have 20 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-A500W
Android version: 5.0.2
PDA version: A500WVLU1APB3
CSC version: A500WOYA1APB3
Phone version: A500WVLS1BPK2
Product code: SM-A500WZKAFMC
CSC country code: Canada
CSC sales code: XAC
Phone SN: RZ8G80EXCYF
IMEI:
HW version: REV0.1
RF cal date: 2016.03.26
Chip name: MSM8916
Modem board: MSM8916
Security patch: 2016-02-01
Boot Warranty bit: 1
SIM State: ABSENT
Rebooting phone... OK
Waiting ADB device... OK
Rebooting phone... OK
Waiting ADB device... OK
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data from phone... OK
Searching Ramdump interface... COM445 detected
Reading data from phone... OK
Calculating... error (3)
Done with Samsung Tool PRO v.34.3