addMessages: 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/addMessages - from package: findbugs

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

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