mia-2dgrayimage-combine-to-rgb: 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/mia-2dgrayimage-combine-to-rgb - from package: mia-tools

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

Error in other languages:
mia-2dgrayimage-combine-to-rgb: bevel nie gevind nie
mia-2dgrayimage-combine-to-rgb: comandă negăsită
mia-2dgrayimage-combine-to-rgb: comando não encontrado
mia-2dgrayimage-combine-to-rgb: commande introuvable
mia-2dgrayimage-combine-to-rgb: command not found
mia-2dgrayimage-combine-to-rgb: käsku ei ole
mia-2dgrayimage-combine-to-rgb: không tìm thấy lệnh
mia-2dgrayimage-combine-to-rgb: komanda nerasta
mia-2dgrayimage-combine-to-rgb: Kommando nicht gefunden.
mia-2dgrayimage-combine-to-rgb: kommandot finns inte
mia-2dgrayimage-combine-to-rgb: komut yok
mia-2dgrayimage-combine-to-rgb: nie znaleziono polecenia
mia-2dgrayimage-combine-to-rgb: níor aimsíodh an t-ordú
mia-2dgrayimage-combine-to-rgb: no se encontró la orden
mia-2dgrayimage-combine-to-rgb: no s'ha trobat l'ordre
mia-2dgrayimage-combine-to-rgb: opdracht niet gevonden
mia-2dgrayimage-combine-to-rgb: parancs nem található
mia-2dgrayimage-combine-to-rgb: perintah tidak ditemukan
mia-2dgrayimage-combine-to-rgb: príkaz nenájdený
mia-2dgrayimage-combine-to-rgb: příkaz nenalezen
mia-2dgrayimage-combine-to-rgb: команда не найдена
mia-2dgrayimage-combine-to-rgb: командата не е открита
mia-2dgrayimage-combine-to-rgb: 命令找不到
mia-2dgrayimage-combine-to-rgb: コマンドが見つかりません