[Freeswitch-users] originate_disposition , hangup_cause - return empty

Hi All fs_cli shows the reason the for the bridge fails is *mod_dptools.c:3096 Originate Failed. Cause: NO_ANSWER* When I try to get the reason for the bridge fail from lua. All the following return empty or nil value local last_bridge_hangup_cause=session:getVariable("last_bridge_hangup_cause") local bridge_hangup_cause=session:getVariable("bridge_hangup_cause") local hangup_cause=session:getVariable("hangup_cause") local originate_disposition = session:getVariable("originate_disposition") Does this seem to be a bug? or I am accessing a wrong variable? Thanks Lloyd