gmime-uudecode: 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/gmime-uudecode - from package: gmime-bin

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

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