Hello, I am having an intermittent issue with call_info.conf_slot sometimes being set to PJSUA_INVALID_ID on a connected call. I noticed this while trying to create a player for the call in question. I should note that I have already successfully created and destroyed players on this particular call without any issues. Any idea what might be causing this? I am guessing it has something to do with a re-invite because my on_call_media_state callback was called right before this problem came up. There did not seem to be any issue with the value of conf_slot during the on_call_media_state callback. Anyway, here is the call_info for the call in question: call_info = { id = 2, role = PJSIP_ROLE_UAC, acc_id = 0, local_info = ..., local_contact = ..., remote_info = ..., remote_contact = ..., call_id = {ptr = 0x7fffffffc000 "tNcpcvll0qd6trH2OM-Q574acDaSOhyW", slen = 32}, state = PJSIP_INV_STATE_CONFIRMED, state_text = {ptr = 0x5278a7 "CONFIRMED", slen = 9}, last_status = PJSIP_SC_OK, last_status_text = {ptr = 0x7fffffffc080 "OK", slen = 2}, media_status = PJSUA_CALL_MEDIA_NONE, media_dir = PJMEDIA_DIR_NONE, conf_slot = -1, connect_duration = {sec = 24, msec = 630}, total_duration = {sec = 36, msec = 150}, buf_ = {...} } -- Michael Broughton, Advanis Unintended Recipient & Unauthorized Use of E-Mail: This message and attachments may contain confidential or privileged information that is intended only for the named recipient of this e-mail. Any unauthorized use or distribution is not permitted. If you have received this e-mail in error, deleting the e-mail and notifying the sender would be appreciated. Thank you.