wvWml: 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/wvWml - from package: wv

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

On Debian possible default full paths are:

/usr/bin/wvWml - from package: wv

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

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