bp_nrdb: 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/bp_nrdb - from package: bioperl

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

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