[Freeswitch-users] user hangup in a conference

is there a way to know whe a conference doesn't exist anymore from the dialplan ? like after this line <action application="set" data="hangup_after_bridge=true"/> <action application="set" data="continue_on_fail=true"/> <action application="conference" data="conf_name}@default+${conf_pin}"/> i'd like to know if there are members yet in the conference <action application="set" data="myVar=${conference(conf_name list)}"/> it works if the user send a dtmf key lke # (from conference default control keys) but if the user hangup as normal so the dialplan doesn't continue after the conference XML line. Any idea ? Thanks