mltac: command not found

Have You tried accessing the binary with the full path?

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/mltac - from package: svtools

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