reordertp: 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/reordertp - from package: multicat

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

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