msconvert: 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/msconvert - from package: libpwiz-tools

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

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