During a FreeSwitch call a sofia media error occured (sofia.c:896 nua_i_media_error: unknown event 22: 988 Incomplete offer/answer) I am using FreeSwitch Stable Release 1.0.6 and want to use it for production. Does anyone know why this error comes? 2010-04-27 10:02:38.421875 [DEBUG] sofia_glue.c:3585 Audio Codec Compare [PCMA:8:8000:20]/[PCMA:8:8000:20] 2010-04-27 10:02:38.421875 [DEBUG] sofia_glue.c:2292 Already using PCMA 2010-04-27 10:02:38.421875 [DEBUG] sofia_glue.c:3524 Set 2833 dtmf send/recv payload to 101 2010-04-27 10:02:38.421875 [DEBUG] sofia.c:4604 Processing updated SDP 2010-04-27 10:02:38.421875 [DEBUG] sofia_glue.c:2579 Audio params are unchanged for sofia/internal/1010@192.168.1.234. 2010-04-27 10:03:39.328125 [DEBUG] sofia.c:4153 Channel sofia/internal/1010@192.168.1.234 entering state [calling][0] 2010-04-27 10:03:39.484375 [DEBUG] sofia.c:896 nua_i_media_error: unknown event 22: 988 Incomplete offer/answer 2010-04-27 10:03:39.484375 [DEBUG] sofia.c:4153 Channel sofia/internal/1010@192.168.1.234 entering state [terminating][200] 2010-04-27 10:03:39.484375 [NOTICE] sofia.c:4789 Hangup sofia/internal/1010@192.168.1.234 [CS_EXECUTE] [NORMAL_CLEARING] 2010-04-27 10:03:39.484375 [DEBUG] switch_channel.c:2102 Send signal sofia/internal/1010@192.168.1.234 [KILL] 2010-04-27 10:03:39.484375 [DEBUG] switch_core_session.c:1021 Send signal sofia/internal/1010@192.168.1.234 [BREAK] 2010-04-27 10:03:39.500000 [ERR] switch_rtp.c:2395 switch_rtp.c if (switch_rtp_ready(rtp_session)) ...