[Freeswitch-users] Having some trouble recording calls.

I'm using the uuid_record command to tell Freeswitch to record a call. RecordResult = pbx:api( uuid_record, Operator#pbx_operator_registry.operator_uuid ++ " start " ++ FullFileName ), After the customer hangs up, I tell it to stop recording: StopRecordResult = pbx:api( uuid_record, Operator#pbx_operator_registry.operator_uuid ++ " stop " ++ FullFileName ), However, I get an error "-ERR Cannot stop record session!". Any subsequent attempts to start a new recording file also fail. What am I doing wrong?