antpm-fit2gpx: 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/antpm-fit2gpx - from package: antpm

You may install the required package with command apt-get install {package}
Error in other languages:
antpm-fit2gpx: bevel nie gevind nie
antpm-fit2gpx: comandă negăsită
antpm-fit2gpx: comando não encontrado
antpm-fit2gpx: commande introuvable
antpm-fit2gpx: command not found
antpm-fit2gpx: käsku ei ole
antpm-fit2gpx: không tìm thấy lệnh
antpm-fit2gpx: komanda nerasta
antpm-fit2gpx: Kommando nicht gefunden.
antpm-fit2gpx: kommandot finns inte
antpm-fit2gpx: komut yok
antpm-fit2gpx: nie znaleziono polecenia
antpm-fit2gpx: níor aimsíodh an t-ordú
antpm-fit2gpx: no se encontró la orden
antpm-fit2gpx: no s'ha trobat l'ordre
antpm-fit2gpx: opdracht niet gevonden
antpm-fit2gpx: parancs nem található
antpm-fit2gpx: perintah tidak ditemukan
antpm-fit2gpx: príkaz nenájdený
antpm-fit2gpx: příkaz nenalezen
antpm-fit2gpx: команда не найдена
antpm-fit2gpx: командата не е открита
antpm-fit2gpx: 命令找不到
antpm-fit2gpx: コマンドが見つかりません