Hi, I've received reports of the following assertion failure: ../src/pjmedia/wav_player.c:554: file_get_frame: Assertion `fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ULAW || fport->fmt_tag == PJMEDIA_WAVE_FMT_TAG_ALAW' failed file_get_frame seems to be called within the context of the soundcard thread (which makes sense). What I think is happening is that I'm calling pjmedia_port_destroy() on the port and pjsip_endpt_release_pool() on the pool containing it while the soundcard thread is in this function. My questions are: 1) Is this possible? 2) If so, what can I do to prevent this? Ruud Klaver AG Projects