J727T1 Reading data from phone... error (1)

Hello Support, I have a problem with This hand set, we trying to unlock but have error (1) we need to clear what's means this error.
Best Regards bedel.

Operation: Unlock
Selected model: SM-J727T1
Software version: 33.8

Checking Login and Password... OK
Ballance: 10 crd.
You have 10 credit(s) left. This operation takes 5 credits.Continue? Yes
Waiting ADB device... OK
Reading phone info...
Model: SM-J727T1
Android version: 7.0
PDA version: J727T1UVS3ARE1
CSC version: J727T1TMK3ARE1
Phone version: J727T1UVS3ARE1
Product code: SM2J727TZKETMK
CSC country code: USA
CSC sales code: TMK
Phone SN: R28K218TJRM
IMEI: 354254092179352
HW version: REV0.7
RF cal date: 20180212
Chip name: EXYNOS7870
Modem board: SHANNON315
Security patch: 2018-05-01
Boot Warranty bit: 0
Searching Samsung diag port... detected COM174
Reading phone info... OK
CP version: J727T1UVS3ARE1
CP build: May 3 2018 14:07:35
Reading data from phone... error (1)

Done with Samsung Tool PRO v.33.8