contml: 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/lib/phylip/bin/contml - from package: phylip

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

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