FlowgramAli_4frame: 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/support_files/denoiser/bin/FlowgramAli_4frame - from package: qiime

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

Error in other languages:
FlowgramAli_4frame: bevel nie gevind nie
FlowgramAli_4frame: comandă negăsită
FlowgramAli_4frame: comando não encontrado
FlowgramAli_4frame: commande introuvable
FlowgramAli_4frame: command not found
FlowgramAli_4frame: käsku ei ole
FlowgramAli_4frame: không tìm thấy lệnh
FlowgramAli_4frame: komanda nerasta
FlowgramAli_4frame: Kommando nicht gefunden.
FlowgramAli_4frame: kommandot finns inte
FlowgramAli_4frame: komut yok
FlowgramAli_4frame: nie znaleziono polecenia
FlowgramAli_4frame: níor aimsíodh an t-ordú
FlowgramAli_4frame: no se encontró la orden
FlowgramAli_4frame: no s'ha trobat l'ordre
FlowgramAli_4frame: opdracht niet gevonden
FlowgramAli_4frame: parancs nem található
FlowgramAli_4frame: perintah tidak ditemukan
FlowgramAli_4frame: príkaz nenájdený
FlowgramAli_4frame: příkaz nenalezen
FlowgramAli_4frame: команда не найдена
FlowgramAli_4frame: командата не е открита
FlowgramAli_4frame: 命令找不到
FlowgramAli_4frame: コマンドが見つかりません