iac: 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/iac - from package: libpolyorb3-dev

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

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