proml: 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/proml - from package: phylip

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

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