make-plots: 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/make-plots - from package: rivet

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

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