poe-gen-tests: 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 CentOS possible default full paths are:

/usr/bin/poe-gen-tests - from package: perl-POE-Test-Loops

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/poe-gen-tests - from package: libpoe-test-loops-perl

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

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