wbmp2xbm: 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/wbmp2xbm - from package: wapua

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

Error in other languages:
wbmp2xbm: bevel nie gevind nie
wbmp2xbm: comandă negăsită
wbmp2xbm: comando não encontrado
wbmp2xbm: commande introuvable
wbmp2xbm: command not found
wbmp2xbm: käsku ei ole
wbmp2xbm: không tìm thấy lệnh
wbmp2xbm: komanda nerasta
wbmp2xbm: Kommando nicht gefunden.
wbmp2xbm: kommandot finns inte
wbmp2xbm: komut yok
wbmp2xbm: nie znaleziono polecenia
wbmp2xbm: níor aimsíodh an t-ordú
wbmp2xbm: no se encontró la orden
wbmp2xbm: no s'ha trobat l'ordre
wbmp2xbm: opdracht niet gevonden
wbmp2xbm: parancs nem található
wbmp2xbm: perintah tidak ditemukan
wbmp2xbm: príkaz nenájdený
wbmp2xbm: příkaz nenalezen
wbmp2xbm: команда не найдена
wbmp2xbm: командата не е открита
wbmp2xbm: 命令找不到
wbmp2xbm: コマンドが見つかりません