error unlock j7 prime

metropcs....

Operation: Unlock
Selected model: SM-J727T1
Software version: 31.5

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-J727T1
Android version: 7.0
PDA version: J727T1UVS3ARC1
CSC version: J727T1TMK3ARC1
Phone version: J727T1UVS3ARC1
Product code: SM2J727TZKETMK
CSC country code: USA
CSC sales code: TMK
Phone SN: R58K23WLJKA
IMEI: 354804092xxxxxx
HW version: REV0.7
RF cal date: 20180226
Chip name: EXYNOS7870
Modem board: SHANNON315
Security patch: 2018-03-01
Boot Warranty bit: 0
Searching Samsung diag port... detected COM64
Reading phone info... OK
CP version: J727T1UVS3ARC1
CP build: Mar 5 2018 19:36:14
Reading data from phone... error (1)

Done with Samsung Tool PRO v.31.5