MapAlignerPoseClustering: command not found

Have You tried accessing the binary with the full path?

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/bin/MapAlignerPoseClustering - from package: topp

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