swfrender: command not found

Have You tried accessing the binary with the full path?

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/lib/debug/usr/bin/swfrender - from package: swftools-dbg
/usr/bin/swfrender - from package: swftools

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