makehrtf: command not found

Have You tried accessing the binary with the full path?

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/makehrtf - from package: makehrtf

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