[Freeswitch-users] lua call to stop_record_session - INVALID COMMAND

I was trying to stop a session record from lua but when I try I get a "Result is INVALID COMMAND!" I am calling this lua script with <action application="set" data="api_hangup_hook=lua proc.lua .."/> so by the time the lua is called, someone has hungup one of the legs. In the lua script I am using this to try to end the record session to the wav file so it gets closed and so I can convert it to mp3 right away and a few other things in the lua script... apicmd = "stop_record_session"; apiarg = recordfile; res = api:execute(apicmd,apiarg); but that is when I get the INVALID COMMAND on the freeswitch console. Is there a proper way to do this from lua?