tmxsplit: 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/bin/tmxsplit - from package: libxml-tmx-perl

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