splitindex: 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/splitindex - from package: texlive-latex-extra

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

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