vina_split: 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/vina_split - from package: autodock-vina

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

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