na_record: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/na_record - from package: speech-tools

You may install the required package with command apt-get install {package}

Error in other languages:
na_record: bevel nie gevind nie
na_record: comandă negăsită
na_record: comando não encontrado
na_record: commande introuvable
na_record: command not found
na_record: käsku ei ole
na_record: không tìm thấy lệnh
na_record: komanda nerasta
na_record: Kommando nicht gefunden.
na_record: kommandot finns inte
na_record: komut yok
na_record: nie znaleziono polecenia
na_record: níor aimsíodh an t-ordú
na_record: no se encontró la orden
na_record: no s'ha trobat l'ordre
na_record: opdracht niet gevonden
na_record: parancs nem található
na_record: perintah tidak ditemukan
na_record: príkaz nenájdený
na_record: příkaz nenalezen
na_record: команда не найдена
na_record: командата не е открита
na_record: 命令找不到
na_record: コマンドが見つかりません