ecaconvert: 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/ecaconvert - from package: ecatools

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

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