htmlcxx: 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/htmlcxx - from package: libhtmlcxx-dev

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

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