wps2raw: 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

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/wps2raw - from package: libwps-tools

You may install the required package with command apt-get install {package}
Error in other languages:
wps2raw: bevel nie gevind nie
wps2raw: comandă negăsită
wps2raw: comando não encontrado
wps2raw: commande introuvable
wps2raw: command not found
wps2raw: käsku ei ole
wps2raw: không tìm thấy lệnh
wps2raw: komanda nerasta
wps2raw: Kommando nicht gefunden.
wps2raw: kommandot finns inte
wps2raw: komut yok
wps2raw: nie znaleziono polecenia
wps2raw: níor aimsíodh an t-ordú
wps2raw: no se encontró la orden
wps2raw: no s'ha trobat l'ordre
wps2raw: opdracht niet gevonden
wps2raw: parancs nem található
wps2raw: perintah tidak ditemukan
wps2raw: príkaz nenájdený
wps2raw: příkaz nenalezen
wps2raw: команда не найдена
wps2raw: командата не е открита
wps2raw: 命令找不到
wps2raw: コマンドが見つかりません