I have 4 GPU but work only 3 GPU. 4x RX480 8gb. System i7 920 and 12gb.
When i start optiminer say:
[2017-05-10 18:46:21.474] [info] Connected to zero.suprnova.cc:6568.
[2017-05-10 18:46:21.474] [info] Got new work.
[2017-05-10 18:46:21.964] [info] [GPU3] Device info: {"id": "0/3" "name": "Ellesmere" "platform": "AMD"
r": "2348.3"}
[2017-05-10 18:46:31.694] [info] GPU3 Waiting for work from pool.
[2017-05-10 18:46:31.694] [info] GPU3 Got work, start mining.
[2017-05-10 18:46:31.714] [error] OpenCL error: readBuffer Solutions1 (CL_INVALID_EVENT_WAIT_LIST)
[2017-05-10 18:46:31.724] [info] Press any key to exit application.

Help pls.