copyBuggySource: 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/copyBuggySource - from package: findbugs

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

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