[Freeswitch-users] esl_event_get_header error

I am trying to check if event received was CHANNEL_HANUP I am doing somthing like this const char *last_event = esl_event_get_header(call_info->global_handle->last_event,"Event-Name"); if (strcmp(last_event,"CHANNEL_HANGUP")) { exit(0); } However an error occurs src/esl_event.c:244: esl_event_get_header_ptr: Assertion `event' failed.