processcsv.py: 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/processcsv.py - from package: virt-top

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

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