POFileEquiv: 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/POFileEquiv - from package: gettext-lint

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

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