progen: 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/progen - from package: tmake

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