bp_mask_by_search: 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_mask_by_search - from package: bioperl

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

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