directvnc-xmapconv: 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/directvnc-xmapconv - from package: directvnc

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

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