fbwrap: 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/fbwrap - from package: findbugs

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

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