SM-G955F reading pit error

please is there anyone can help me i have a big problem
tried to flash combination for g955f for frp unlocking and it was stopped in 30%
when z3x upload the system files
and now z3x or odin can't read pit from phone
[ 04/08/2018 14:33:09 ] Operation: Flash
[ 04/08/2018 14:33:10 ] Selected model: SM-G955F
[ 04/08/2018 14:33:10 ] Software version: 33.5
[ 04/08/2018 14:33:10 ]
[ 04/08/2018 14:33:10 ] File analysis... OK
[ 04/08/2018 14:33:11 ] Total file size: 0x7DBC1768 (2011 Mb)
[ 04/08/2018 14:33:11 ] Searching USB Flash interface... COM19 detected
[ 04/08/2018 14:33:11 ] Setup connection... OK
[ 04/08/2018 14:33:12 ] Reading PIT from phone... OK
[ 04/08/2018 14:33:12 ] Sending sboot.bin... OK
[ 04/08/2018 14:33:13 ] Sending param.bin... OK
[ 04/08/2018 14:33:14 ] Sending up_param.bin... OK
[ 04/08/2018 14:33:15 ] Sending cm.bin... OK
[ 04/08/2018 14:33:16 ] Sending nad_fw.bin... OK
[ 04/08/2018 14:33:19 ] Sending nad_refer.bin... OK
[ 04/08/2018 14:33:20 ] Sending boot.img... OK
[ 04/08/2018 14:33:27 ] Sending recovery.img... OK
[ 04/08/2018 14:33:30 ] Sending system.img... error timeout
[ 04/08/2018 14:35:15 ]
[ 04/08/2018 14:35:17 ] Operation: Flash
[ 04/08/2018 14:35:17 ] Selected model: SM-G955F
[ 04/08/2018 14:35:18 ] Software version: 33.5
[ 04/08/2018 14:35:18 ]
[ 04/08/2018 14:35:18 ] File analysis... OK
[ 04/08/2018 14:35:19 ] Total file size: 0x7DBC1768 (2011 Mb)
[ 04/08/2018 14:35:19 ] Searching USB Flash interface... COM19 detected
[ 04/08/2018 14:35:19 ] Setup connection... OK
[ 04/08/2018 14:35:20 ] Reading PIT from phone... error