splitvt: 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/splitvt - from package: splitvt

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

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