bp_taxid4species: 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_taxid4species - from package: bioperl

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

Error in other languages:
bp_taxid4species: bevel nie gevind nie
bp_taxid4species: comandă negăsită
bp_taxid4species: comando não encontrado
bp_taxid4species: commande introuvable
bp_taxid4species: command not found
bp_taxid4species: käsku ei ole
bp_taxid4species: không tìm thấy lệnh
bp_taxid4species: komanda nerasta
bp_taxid4species: Kommando nicht gefunden.
bp_taxid4species: kommandot finns inte
bp_taxid4species: komut yok
bp_taxid4species: nie znaleziono polecenia
bp_taxid4species: níor aimsíodh an t-ordú
bp_taxid4species: no se encontró la orden
bp_taxid4species: no s'ha trobat l'ordre
bp_taxid4species: opdracht niet gevonden
bp_taxid4species: parancs nem található
bp_taxid4species: perintah tidak ditemukan
bp_taxid4species: príkaz nenájdený
bp_taxid4species: příkaz nenalezen
bp_taxid4species: команда не найдена
bp_taxid4species: командата не е открита
bp_taxid4species: 命令找不到
bp_taxid4species: コマンドが見つかりません