vecsplit: command not found

Have You tried accessing the binary with the full path?

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/vecsplit - from package: voxbo

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