QCMerger: 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/QCMerger - from package: topp

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

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