c2xml: 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/c2xml - from package: sparse

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

Error in other languages:
c2xml: bevel nie gevind nie
c2xml: comandă negăsită
c2xml: comando não encontrado
c2xml: commande introuvable
c2xml: command not found
c2xml: käsku ei ole
c2xml: không tìm thấy lệnh
c2xml: komanda nerasta
c2xml: Kommando nicht gefunden.
c2xml: kommandot finns inte
c2xml: komut yok
c2xml: nie znaleziono polecenia
c2xml: níor aimsíodh an t-ordú
c2xml: no se encontró la orden
c2xml: no s'ha trobat l'ordre
c2xml: opdracht niet gevonden
c2xml: parancs nem található
c2xml: perintah tidak ditemukan
c2xml: príkaz nenájdený
c2xml: příkaz nenalezen
c2xml: команда не найдена
c2xml: командата не е открита
c2xml: 命令找不到
c2xml: コマンドが見つかりません