vpe: 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/vpe - from package: texlive-latex-extra

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