splitimage2pdf: 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/splitimage2pdf - from package: leptonica-progs

You may install the required package with command apt-get install {package}
Error in other languages:
splitimage2pdf: bevel nie gevind nie
splitimage2pdf: comandă negăsită
splitimage2pdf: comando não encontrado
splitimage2pdf: commande introuvable
splitimage2pdf: command not found
splitimage2pdf: käsku ei ole
splitimage2pdf: không tìm thấy lệnh
splitimage2pdf: komanda nerasta
splitimage2pdf: Kommando nicht gefunden.
splitimage2pdf: kommandot finns inte
splitimage2pdf: komut yok
splitimage2pdf: nie znaleziono polecenia
splitimage2pdf: níor aimsíodh an t-ordú
splitimage2pdf: no se encontró la orden
splitimage2pdf: no s'ha trobat l'ordre
splitimage2pdf: opdracht niet gevonden
splitimage2pdf: parancs nem található
splitimage2pdf: perintah tidak ditemukan
splitimage2pdf: príkaz nenájdený
splitimage2pdf: příkaz nenalezen
splitimage2pdf: команда не найдена
splitimage2pdf: командата не е открита
splitimage2pdf: 命令找不到
splitimage2pdf: コマンドが見つかりません