Hello Everyone!
Found this in the SM's Event Log of my PTP 450 900MHz link running 15.1.1
09/13/2017 : 10:44:32 EST : :ev_send() OSFlagPost() failed 150 posting tid 0 (63) evflags 1 caller 0x28524c
09/13/2017 : 23:55:01 EST : :ev_send() OSFlagPost() failed 150 posting tid 0 (63) evflags 1 caller 0x28524c
09/13/2017 : 23:55:07 EST : :ev_send() OSFlagPost() failed 150 posting tid 0 (63) evflags 1 caller 0x28524c
09/13/2017 : 23:55:43 EST : :ev_send() OSFlagPost() failed 150 posting tid 0 (63) evflags 1 caller 0x28524c
09/14/2017 : 08:11:21 EST : :ev_send() OSFlagPost() failed 150 posting tid 0 (63) evflags 1 caller 0x28524c
09/14/2017 : 08:17:06 EST : :ev_send() OSFlagPost() failed 150 posting tid 0 (63) evflags 1 caller 0x28524c
Unsure what I am seeing here.
Found another post dated 3/25/15 at the following link with a similary event log entry.
http://community.cambiumnetworks.com/t5/PMP-450/Strange-event-log-entries/td-p/39554
Stay Safe