ipe5toxml: 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/ipe5toxml - from package: ipe5toxml

You may install the required package with command apt-get install {package}
Error in other languages:
ipe5toxml: bevel nie gevind nie
ipe5toxml: comandă negăsită
ipe5toxml: comando não encontrado
ipe5toxml: commande introuvable
ipe5toxml: command not found
ipe5toxml: käsku ei ole
ipe5toxml: không tìm thấy lệnh
ipe5toxml: komanda nerasta
ipe5toxml: Kommando nicht gefunden.
ipe5toxml: kommandot finns inte
ipe5toxml: komut yok
ipe5toxml: nie znaleziono polecenia
ipe5toxml: níor aimsíodh an t-ordú
ipe5toxml: no se encontró la orden
ipe5toxml: no s'ha trobat l'ordre
ipe5toxml: opdracht niet gevonden
ipe5toxml: parancs nem található
ipe5toxml: perintah tidak ditemukan
ipe5toxml: príkaz nenájdený
ipe5toxml: příkaz nenalezen
ipe5toxml: команда не найдена
ipe5toxml: командата не е открита
ipe5toxml: 命令找不到
ipe5toxml: コマンドが見つかりません