pcpp: 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 CentOS possible default full paths are:

/usr/bin/pcpp - from package: pcc

You may install the required package with command yum install {package}

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