convert2gpx: 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/convert2gpx - from package: foxtrotgps

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

Error in other languages:
convert2gpx: bevel nie gevind nie
convert2gpx: comandă negăsită
convert2gpx: comando não encontrado
convert2gpx: commande introuvable
convert2gpx: command not found
convert2gpx: käsku ei ole
convert2gpx: không tìm thấy lệnh
convert2gpx: komanda nerasta
convert2gpx: Kommando nicht gefunden.
convert2gpx: kommandot finns inte
convert2gpx: komut yok
convert2gpx: nie znaleziono polecenia
convert2gpx: níor aimsíodh an t-ordú
convert2gpx: no se encontró la orden
convert2gpx: no s'ha trobat l'ordre
convert2gpx: opdracht niet gevonden
convert2gpx: parancs nem található
convert2gpx: perintah tidak ditemukan
convert2gpx: príkaz nenájdený
convert2gpx: příkaz nenalezen
convert2gpx: команда не найдена
convert2gpx: командата не е открита
convert2gpx: 命令找不到
convert2gpx: コマンドが見つかりません