spm8_coreg: 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/lib/voxbo/bin/spm8_coreg - from package: voxbo

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

Error in other languages:
spm8_coreg: bevel nie gevind nie
spm8_coreg: comandă negăsită
spm8_coreg: comando não encontrado
spm8_coreg: commande introuvable
spm8_coreg: command not found
spm8_coreg: käsku ei ole
spm8_coreg: không tìm thấy lệnh
spm8_coreg: komanda nerasta
spm8_coreg: Kommando nicht gefunden.
spm8_coreg: kommandot finns inte
spm8_coreg: komut yok
spm8_coreg: nie znaleziono polecenia
spm8_coreg: níor aimsíodh an t-ordú
spm8_coreg: no se encontró la orden
spm8_coreg: no s'ha trobat l'ordre
spm8_coreg: opdracht niet gevonden
spm8_coreg: parancs nem található
spm8_coreg: perintah tidak ditemukan
spm8_coreg: príkaz nenájdený
spm8_coreg: příkaz nenalezen
spm8_coreg: команда не найдена
spm8_coreg: командата не е открита
spm8_coreg: 命令找不到
spm8_coreg: コマンドが見つかりません