pcf2vpnc: 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/pcf2vpnc - from package: vpnc

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

Error in other languages:
pcf2vpnc: bevel nie gevind nie
pcf2vpnc: comandă negăsită
pcf2vpnc: comando não encontrado
pcf2vpnc: commande introuvable
pcf2vpnc: command not found
pcf2vpnc: käsku ei ole
pcf2vpnc: không tìm thấy lệnh
pcf2vpnc: komanda nerasta
pcf2vpnc: Kommando nicht gefunden.
pcf2vpnc: kommandot finns inte
pcf2vpnc: komut yok
pcf2vpnc: nie znaleziono polecenia
pcf2vpnc: níor aimsíodh an t-ordú
pcf2vpnc: no se encontró la orden
pcf2vpnc: no s'ha trobat l'ordre
pcf2vpnc: opdracht niet gevonden
pcf2vpnc: parancs nem található
pcf2vpnc: perintah tidak ditemukan
pcf2vpnc: príkaz nenájdený
pcf2vpnc: příkaz nenalezen
pcf2vpnc: команда не найдена
pcf2vpnc: командата не е открита
pcf2vpnc: 命令找不到
pcf2vpnc: コマンドが見つかりません