uuencode: 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 CentOS possible default full paths are:

/usr/bin/uuencode - from package: sharutils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/uuencode - from package: sharutils

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

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