cdfscale: 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/cdfscale - from package: cdftools

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

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