splitsource: 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

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/splitsource - from package: emboss

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