stag-xml2itext: 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/stag-xml2itext - from package: libdata-stag-perl

You may install the required package with command apt-get install {package}
Error in other languages:
stag-xml2itext: bevel nie gevind nie
stag-xml2itext: comandă negăsită
stag-xml2itext: comando não encontrado
stag-xml2itext: commande introuvable
stag-xml2itext: command not found
stag-xml2itext: käsku ei ole
stag-xml2itext: không tìm thấy lệnh
stag-xml2itext: komanda nerasta
stag-xml2itext: Kommando nicht gefunden.
stag-xml2itext: kommandot finns inte
stag-xml2itext: komut yok
stag-xml2itext: nie znaleziono polecenia
stag-xml2itext: níor aimsíodh an t-ordú
stag-xml2itext: no se encontró la orden
stag-xml2itext: no s'ha trobat l'ordre
stag-xml2itext: opdracht niet gevonden
stag-xml2itext: parancs nem található
stag-xml2itext: perintah tidak ditemukan
stag-xml2itext: príkaz nenájdený
stag-xml2itext: příkaz nenalezen
stag-xml2itext: команда не найдена
stag-xml2itext: командата не е открита
stag-xml2itext: 命令找不到
stag-xml2itext: コマンドが見つかりません