MRMMapper: 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/bin/MRMMapper - from package: topp

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

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