wx2_conv: 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 Debian possible default full paths are:

/usr/bin/wx2_conv - from package: kakasi

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

Error in other languages:
wx2_conv: bevel nie gevind nie
wx2_conv: comandă negăsită
wx2_conv: comando não encontrado
wx2_conv: commande introuvable
wx2_conv: command not found
wx2_conv: käsku ei ole
wx2_conv: không tìm thấy lệnh
wx2_conv: komanda nerasta
wx2_conv: Kommando nicht gefunden.
wx2_conv: kommandot finns inte
wx2_conv: komut yok
wx2_conv: nie znaleziono polecenia
wx2_conv: níor aimsíodh an t-ordú
wx2_conv: no se encontró la orden
wx2_conv: no s'ha trobat l'ordre
wx2_conv: opdracht niet gevonden
wx2_conv: parancs nem található
wx2_conv: perintah tidak ditemukan
wx2_conv: príkaz nenájdený
wx2_conv: příkaz nenalezen
wx2_conv: команда не найдена
wx2_conv: командата не е открита
wx2_conv: 命令找不到
wx2_conv: コマンドが見つかりません