BMPtoRGB: 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/BMPtoRGB - from package: dirac

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

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