[Freeswitch-users] Getting Bill Seconds in Lua

Hi All. I am trying to access the billmsec from lua, but not being very successful at it. Here's what I've done so far: freeswitch.consoleLog("info", "Billable Duration: " .. session:getVariable("variable_billmsec")); However, when I look at the cli, I get an error because it is nil. I am calling this script from the api_hangup_hook. Any suggestions? Thank you, Alex