ecaccess-association-put: 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/ecaccess-association-put - from package: ecaccess

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

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