xps_exc: 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/xps_exc - from package: elk-lapw

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

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