xml2asc: command not found

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/xml2asc - from package: html-xml-utils

You may install the required package with command apt-get install {package}

Error in other languages:
xml2asc: bevel nie gevind nie
xml2asc: comandă negăsită
xml2asc: comando não encontrado
xml2asc: commande introuvable
xml2asc: command not found
xml2asc: käsku ei ole
xml2asc: không tìm thấy lệnh
xml2asc: komanda nerasta
xml2asc: Kommando nicht gefunden.
xml2asc: kommandot finns inte
xml2asc: komut yok
xml2asc: nie znaleziono polecenia
xml2asc: níor aimsíodh an t-ordú
xml2asc: no se encontró la orden
xml2asc: no s'ha trobat l'ordre
xml2asc: opdracht niet gevonden
xml2asc: parancs nem található
xml2asc: perintah tidak ditemukan
xml2asc: príkaz nenájdený
xml2asc: příkaz nenalezen
xml2asc: команда не найдена
xml2asc: командата не е открита
xml2asc: 命令找不到
xml2asc: コマンドが見つかりません