gvpectrl: 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/bin/gvpectrl - from package: gvpe

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

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