bsepostproc: 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/bsepostproc - from package: abinit

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

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