xspim: 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/xspim - from package: spim

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

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