wvHtml: 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/wvHtml - from package: wv

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

On Debian possible default full paths are:

/usr/bin/wvHtml - from package: wv

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

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