bpcancel: 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/bpcancel - from package: ion

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

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