hi . i have 2 gtx 1070 ti . optiminer after 15-20 min stop . how fix this ?

[2018-01-11 17:27:34.769] [warning] Failed to list devices of platform 0: "CL_DEVICE_NOT_FOUND" Ignoring this platform.
[2018-01-11 17:27:35.022] [info] Extranonce is '08fcfe67000000000000000067fefc07'.
[2018-01-11 17:27:35.154] [info] Mining target is 01e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1e1
[2018-01-11 17:27:35.156] [info] Got new work.
[2018-01-11 17:27:35.293] [info] Using generic kernel code.
[2018-01-11 17:27:35.295] [info] Autodetected '--intensity 1' for device 0.
[2018-01-11 17:27:35.296] [info] [GPU0] Device info: {"id": "1/0" "name": "GeForce GTX 1070 Ti" "platform": "Nvidia" "driver": "390.65"}

Failed to list devices of platform 0: "CL_DEVICE_NOT_FOUND" Ignoring this platform , how fix this issue ?

[2018-01-11 18:00:06.957] [info] [GPU1] Share accepted! (443 / 448)
[2018-01-11 18:00:07.639] [info] [GPU1]  5.8 I/s 12.2 S/s (5s) 6.0 I/s 11.9 S/s (1m)
[2018-01-11 18:00:08.100] [info] [GPU1] Share accepted! (444 / 449)
[2018-01-11 18:00:09.549] [info] [Total]  11.8 I/s 22.8 S/s (5s) 11.9 I/s 23.3 S/s (1m)
[2018-01-11 18:00:11.848] [info] [GPU0]  5.8 I/s 13.0 S/s (5s) 5.9 I/s 11.4 S/s (1m)
[2018-01-11 18:00:12.703] [info] [GPU1]  5.8 I/s 12.2 S/s (5s) 6.0 I/s 11.8 S/s (1m)
[2018-01-11 18:00:13.826] [info] [GPU0] Share accepted! (445 / 450)
[2018-01-11 18:00:14.662] [info] [Total]  11.8 I/s 25.8 S/s (5s) 11.9 I/s 23.4 S/s (1m)
[2018-01-11 18:00:16.104] [info] [GPU1] Share accepted! (446 / 451)
[2018-01-11 18:00:16.854] [info] [GPU0]  5.8 I/s 14.2 S/s (5s) 5.9 I/s 11.6 S/s (1m)
[2018-01-11 18:00:17.248] [info] [GPU1] Share accepted! (447 / 452)
[2018-01-11 18:00:17.767] [info] [GPU1]  6.0 I/s 10.4 S/s (5s) 6.0 I/s 11.8 S/s (1m)
[2018-01-11 18:00:19.675] [info] [Total]  11.6 I/s 22.8 S/s (5s) 11.9 I/s 23.1 S/s (1m)
[2018-01-11 18:00:21.129] [info] [GPU0] Share accepted! (448 / 453)
[2018-01-11 18:00:21.624] [info] [GPU0] Share accepted! (449 / 454)
[2018-01-11 18:00:21.991] [info] [GPU0]  5.8 I/s 10.2 S/s (5s) 5.9 I/s 11.6 S/s (1m)
[2018-01-11 18:00:22.150] [info] [GPU1] Share accepted! (450 / 455)
[2018-01-11 18:00:22.833] [info] [GPU1]  6.0 I/s 13.0 S/s (5s) 6.0 I/s 11.7 S/s (1m)
[2018-01-11 18:00:22.971] [info] [GPU1] Share accepted! (451 / 456)
[2018-01-11 18:00:24.793] [info] [Total]  11.6 I/s 21.6 S/s (5s) 11.9 I/s 23.1 S/s (1m)

C:\Users\M-S\Desktop\optiminer-zero-win>pause
Press any key to continue . . .