odf2mht: 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/odf2mht - from package: python-odf

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

Error in other languages:
odf2mht: bevel nie gevind nie
odf2mht: comandă negăsită
odf2mht: comando não encontrado
odf2mht: commande introuvable
odf2mht: command not found
odf2mht: käsku ei ole
odf2mht: không tìm thấy lệnh
odf2mht: komanda nerasta
odf2mht: Kommando nicht gefunden.
odf2mht: kommandot finns inte
odf2mht: komut yok
odf2mht: nie znaleziono polecenia
odf2mht: níor aimsíodh an t-ordú
odf2mht: no se encontró la orden
odf2mht: no s'ha trobat l'ordre
odf2mht: opdracht niet gevonden
odf2mht: parancs nem található
odf2mht: perintah tidak ditemukan
odf2mht: príkaz nenájdený
odf2mht: příkaz nenalezen
odf2mht: команда не найдена
odf2mht: командата не е открита
odf2mht: 命令找不到
odf2mht: コマンドが見つかりません