rivet-mergeruns: 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/rivet-mergeruns - from package: rivet

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

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