categorized_dist_scatterplot.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/categorized_dist_scatterplot.py - from package: qiime

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

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