convmvfs: 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/convmvfs - from package: fuse-convmvfs

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

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