affxml: 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/affxml - from package: afflib-tools

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

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