pius-party-worksheet: 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/pius-party-worksheet - from package: pius

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

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