msgconvert: 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/msgconvert - from package: libemail-outlook-message-perl

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

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