xpathFind: command not found

Have You tried accessing the binary with the full path?

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/xpathFind - from package: findbugs

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