setpdfpage: 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/setpdfpage - from package: libcam-pdf-perl

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

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