conditional_uncovered_probability.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/conditional_uncovered_probability.py - from package: qiime

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

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