msgcmp: 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/msgcmp - from package: gettext

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

On Debian possible default full paths are:

/usr/bin/msgcmp - from package: gettext

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

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