G950w RA1 Read code error (help)

Hi trying to read code from G950W always error please help

Waiting ADB device... OK
Reading phone info...
Model: SM-G950W
Android version: 7.0
Product code: SM-G950WZKATLS
Phone version: G950WVLS2ARA1
PDA version: G950WVLS2ARA1
CSC version: G950WOYA2ARA1
CSC country code: Canada
CSC sales code: TLS
HW version: REV1.0
Phone SN: R28J84WP99B
Chip name: MSM8998
Modem board: MSM8998
Security patch: 2018-01-01
RF cal date: 2017.09.04
IMEI: 3518110901XXXXX
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... COM265 detected
Reading data from phone... error (0 1)

Done with Samsung Tool PRO v.31.0