pwiz: 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 CentOS possible default full paths are:

/usr/bin/pwiz - from package: python-peewee

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