I'm trying to use freeswitch as a transcription gateway : The goal is to allow a PSTN subscriber (A_party) to call another (B_party) through freeswitch : freeswitch being used to record and transcript the call. This is the scenario i'm trying to acheive : 1/ A_party call freeswitch through a PSTN gateway. 2/ freeswitch execute a lua script (IVRPrompt8.lua) that : * query the service database * Initialize few sessions variables * Play A_party a vocal prompt. * Attempt to bridge B_party. 3/ When B_party answer, a lua script is called : catchBAnswer2.lua This script is used to initialise several session variable and play legal warning to both party. <extension name="experimental_dialplan"> <condition field="destination_number" expression="^(\+33XXXXXXXXX)$"> <!-- Play IVR to get the destination number and service parameters --> <action inline="true" application="lua" data="IVRPrompt8.lua" /> <!-- Set channel record settings --> <action application="export" data="RECORD_READ_ONLY=true"/> <action application="export" data="RECORD_STEREO=false"/> <!-- Free the "#" terminator from other use--> <action application="set" data="ivr_menu_terminator=none"/> <action application="export" data="nolocal:execute_on_answer=lua catchBAnswer2.lua"/> <!-- Finally bridge the call --> <action application="bridge" data="sofia/gateway/ippi_33XXXXXXXXX/${destination_number}"/> </condition> </extension> Sometimes the scenario works just fine, but most of the time it crash when calling catchBAnswer2.lua, as show the last console logs (DEBUG LEVEL): 2018-10-12 09:42:26.812449 [NOTICE] sofia.c:7304 Pre-Answer sofia/external5090/0665199963! 2018-10-12 09:42:26.812449 [DEBUG] switch_channel.c:3482 (sofia/external5090/0665199963) Callstate Change RINGING -> EARLY 2018-10-12 09:42:26.812449 [DEBUG] sofia.c:7291 Channel sofia/external5090/0665199963 entering state [ready][200] 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:5478 Audio Codec Compare [PCMA:8:8000:20:64000:1]/[PCMA:8:8000:20:64000:1] 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:5533 Audio Codec Compare [PCMA:8:8000:20:64000:1] ++++ is saved as a match 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:5394 Set telephone-event payload to 101@8000 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:3781 Set Codec sofia/external5090/0665199963 PCMA/8000 20 ms 160 samples 64000 bits 1 channels 2018-10-12 09:42:26.812449 [DEBUG] switch_core_codec.c:111 sofia/external5090/0665199963 Original read codec set to PCMA:8 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:5737 Set telephone-event payload to 101@8000 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:5795 sofia/external5090/0665199963 Set 2833 dtmf send payload to 101 recv payload to 101 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:8511 AUDIO RTP [sofia/external5090/0665199963] 94.23.42.139 port 29498 -> 194.169.214.61 port 59684 codec: 8 ms: 20 2018-10-12 09:42:26.812449 [DEBUG] switch_rtp.c:4300 Starting timer [soft] 160 bytes per 20ms 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:8815 sofia/external5090/0665199963 Set 2833 dtmf send payload to 101 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:8822 sofia/external5090/0665199963 Set 2833 dtmf receive payload to 101 2018-10-12 09:42:26.812449 [DEBUG] switch_core_media.c:8845 sofia/external5090/0665199963 Set rtp dtmf delay to 40 2018-10-12 09:42:26.812449 [NOTICE] sofia.c:8429 Channel [sofia/external5090/0665199963] has been answered EXECUTE sofia/external5090/0665199963 lua(catchBAnswer2.lua) ** CORE DUMP ** I have no clues why this is happening, so i included the backtrack enclosed to have feedbacks (https://freeswitch.org/jira/browse/FS-11456). Can somebody have a look and give a more precise idea on what is making freeswitch to crash ? I can then setup monitoring and collect additional traces if needed (SIP, RTP, etc..). J. Terrasson