sp-gxmlcpp-xsltproc: 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/sp-gxmlcpp-xsltproc - from package: libsp-gxmlcpp1

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