pick_rep_set.py: 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/lib/qiime/bin/pick_rep_set.py - from package: qiime

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

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