wvAbw: 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/wvAbw - from package: wv

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

On Debian possible default full paths are:

/usr/bin/wvAbw - from package: wv

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

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