hxmkbib: 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/hxmkbib - from package: html-xml-utils

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

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