oe2fps: 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/oe2fps - from package: python-chemfp

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

Error in other languages:
oe2fps: bevel nie gevind nie
oe2fps: comandă negăsită
oe2fps: comando não encontrado
oe2fps: commande introuvable
oe2fps: command not found
oe2fps: käsku ei ole
oe2fps: không tìm thấy lệnh
oe2fps: komanda nerasta
oe2fps: Kommando nicht gefunden.
oe2fps: kommandot finns inte
oe2fps: komut yok
oe2fps: nie znaleziono polecenia
oe2fps: níor aimsíodh an t-ordú
oe2fps: no se encontró la orden
oe2fps: no s'ha trobat l'ordre
oe2fps: opdracht niet gevonden
oe2fps: parancs nem található
oe2fps: perintah tidak ditemukan
oe2fps: príkaz nenájdený
oe2fps: příkaz nenalezen
oe2fps: команда не найдена
oe2fps: командата не е открита
oe2fps: 命令找不到
oe2fps: コマンドが見つかりません