polyA_clip: 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/staden/bin/polyA_clip - from package: staden

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

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