rplan: 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/rplan - from package: routeplanner

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

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