Hi, I'm running into an issue in the following situation (sorry about the lack of code): 1. I do pjmedia_endpoint_create with 0 threads, giving it the ioqueue from my pjsip_enpoint using pjsip_endpt_get_ioqueue 2. I have a worker thread that does pjsip_endpt_handle_events in a loop 3. I call pjmedia_transport_udp_create to create a RTP/RTCP over UDP port pair 4. I destroy the UDP transport using pjmedia_transport_close 5. pjsip_endpt_handle_events returns the ETIMEDOUT ("Operation timed out") system error. On Linux this problem does not occur, it seems to be OS X specific. Maybe it has something to do with the bug discussed in this thread: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/2008-April/002531.html Any idea what's going on here? Ruud Klaver AG Projects