as3compile: 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/as3compile - from package: swftools

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

Error in other languages:
as3compile: bevel nie gevind nie
as3compile: comandă negăsită
as3compile: comando não encontrado
as3compile: commande introuvable
as3compile: command not found
as3compile: käsku ei ole
as3compile: không tìm thấy lệnh
as3compile: komanda nerasta
as3compile: Kommando nicht gefunden.
as3compile: kommandot finns inte
as3compile: komut yok
as3compile: nie znaleziono polecenia
as3compile: níor aimsíodh an t-ordú
as3compile: no se encontró la orden
as3compile: no s'ha trobat l'ordre
as3compile: opdracht niet gevonden
as3compile: parancs nem található
as3compile: perintah tidak ditemukan
as3compile: príkaz nenájdený
as3compile: příkaz nenalezen
as3compile: команда не найдена
as3compile: командата не е открита
as3compile: 命令找不到
as3compile: コマンドが見つかりません