pymvpa2-prep-afni-surf: 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/pymvpa2-prep-afni-surf - from package: python-mvpa2

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

Error in other languages:
pymvpa2-prep-afni-surf: bevel nie gevind nie
pymvpa2-prep-afni-surf: comandă negăsită
pymvpa2-prep-afni-surf: comando não encontrado
pymvpa2-prep-afni-surf: commande introuvable
pymvpa2-prep-afni-surf: command not found
pymvpa2-prep-afni-surf: käsku ei ole
pymvpa2-prep-afni-surf: không tìm thấy lệnh
pymvpa2-prep-afni-surf: komanda nerasta
pymvpa2-prep-afni-surf: Kommando nicht gefunden.
pymvpa2-prep-afni-surf: kommandot finns inte
pymvpa2-prep-afni-surf: komut yok
pymvpa2-prep-afni-surf: nie znaleziono polecenia
pymvpa2-prep-afni-surf: níor aimsíodh an t-ordú
pymvpa2-prep-afni-surf: no se encontró la orden
pymvpa2-prep-afni-surf: no s'ha trobat l'ordre
pymvpa2-prep-afni-surf: opdracht niet gevonden
pymvpa2-prep-afni-surf: parancs nem található
pymvpa2-prep-afni-surf: perintah tidak ditemukan
pymvpa2-prep-afni-surf: príkaz nenájdený
pymvpa2-prep-afni-surf: příkaz nenalezen
pymvpa2-prep-afni-surf: команда не найдена
pymvpa2-prep-afni-surf: командата не е открита
pymvpa2-prep-afni-surf: 命令找不到
pymvpa2-prep-afni-surf: コマンドが見つかりません