kdtoa: 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/kdtoa - from package: freewnn-kserver

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