cmconvert: 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/cmconvert - from package: infernal

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

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