dicompyler: 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/bin/dicompyler - from package: dicompyler

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